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How to Find & Read Your Tire Size. Locate th.

Load index. The load index on a passenger-car tire is a numerical code stipulating the maximum load (mass, or weight) each tire can carry. For load range "B" tires, ETRTO (ISO-Metric) standards specify the load index rating at an inflation pressure of 36 psi (250 kPa) (table below), while P-Metric standards measure the load capacity at an inflation pressure of 35 psi (240 kPa).The Best Tire Pressure Gauges in 2024 are the Joes Racing Products Tire Pressure Gauge, Milton Pencil, InterComp Glow-In-The-Dark Gauge, Jaco ElitePro, and Grit Performance.Measuring Distances: When measuring the distances between the front and back of your tires, be sure to measure from the same points on each tire. This will help ensure that your measurements are consistent and accurate. Adjustment Increments: When adjusting the toe alignment, make small adjustments at a time. This will help you fine-tune the ...If your tread depth is level with the tire's wear indicator, your tires are completely worn out and need to be replaced ASAP. Using a Tread Depth Gauge Finally, the most accurate way to measure your tread depth is with a professional tread depth gauge, which you can find at an auto parts store or online.Thus, a 110mm tire measures a little more than 4.3 inches in width (4.330 inches), and the 120mm tire measures a little more than 4.7 inches in width (4.724). However, the second number is also important because it refers to the sidewall aspect ratio. In the case of our two examples the aspect ratio numbers are 90 and 80 respectively.Stepwise Coastdown Methodology for Measuring Tire Rolling Resistance J2452_201707 This SAE Recommended Practice is applicable to pneumatic Passenger Car "P" Type, Light Truck Metric, and Light Truck High Flotation tires, or similar tires approved by bodies other than Tire & Rim Association.Step four: How to install tires on rims. Note: Tires are made slightly smaller than the rim's diameter. Therefore, soak the tires in hot water for 10 minutes or until soft to the touch in order to stretch them over the rims. Learn how to measure and install patio chair tires.Prefer a rim by measuring diameter of tires. Follow the manufacturers’ approval rate to get the accurate width of the tire. Tire is available on different width which varies from 1 1/2 to 2’’, Tire manufacturers’ made different sizes width for different tires. Tip •Prior to buy a tire; think again and again about the load ratings.5 Lug Wheel Tire Combination Measuring Tool Gauge for 5x4.5 5x4.75 5x5 Hubs, for Ford for Chrysler, Durable Steel. 3.1 out of 5 stars. 19. $29.99 $ 29. 99. Buy 2, save 2%. FREE delivery Thu, Mar 14 on $35 of items shipped by Amazon. ROLATAPE RT204 Dual 4-inch Measuring Wheel , Yellow.Learn more about tire speed rating. Goodyear also offers high flotation tires. You will be able to choose your tire size, tire width, and tire rim size within the tire finder tool. Learn how to read your tire size from your local tire professionals. Contact us and let us help you find the right tire size for your vehicle.First, be sure the tire is properly inflated. Then, from the top center, stretch the tape measure straight down to the bottom center of the tire to measure the outer diameter. Now, measure the width of your RV tire by spanning from sidewall to sidewall using a tape measure. RV wheel covers come in size ranges like 19-22 inches, 24-26 inches ...RV tire sizes are determined by the size of the rims, which are usually between 14.5 inches to 19.5 inches in diameter on the larger rigs. Half-inch measurements are typically foun...Best Overall Tire Pressure Gauge: WINTERS Tire Pressure Gauge, 100 PSI. Best Budget Tire Pressure Gauge: Slime 5-50PSI Pencil Gauge. Best Tire Pressure Gauge for Off-Roading: ARB ARB505 Deflator ...How to Measure Tire Tread Depth with a Canadian Coin. A classic way of measuring your tire tread depth is by using a quarter Canadian coin. You can insert it in one of the grooves with the caribou facing down. If you can visibly see the tip of the nose, it means that your tire tread depth is below the 6/32 inch- threshold and you should replace ...The idea of the penny test is to check whether you’ve hit the 2/32” threshold. Here’s how it works: Place a penny between the tread ribs on your tire. A “rib” refers to the raised portion of tread that spans the circumference of your tire. Tire tread is composed of several ribs. Turn the penny so that Lincoln’s head points down into ...A tread gauge is a simple tool to measure tire tread depth in increments of 1/32″ or 1mm. Most use a probe inserted into a tread groove to measure the distance …When it comes to mountain bikes, the internal rim width gets much larger as tire sizes across mountain bikes change significantly. On a mountain bike, the typical range of tires is from 2.1" to 2.7" (53-69 mm). The rim width generally ranges from 21 mm to 31 mm on modern mountain bikes. Yes, this is a huge range, but companies produce a ...The tire tread depth penny check works by showing how much of Lincoln's head is covered by the tread. If the top of his head is visible, you are at the DOT minimum tire tread depth. When during the penny test, the tire tread covers Lincoln's head, the tires still have passing tire tread depth (over 2/32"). While using a penny to measure tire ...Used tires tread can be up to 90%, but the average is 6-8/32". Tires in good condition should have a minimum of 6/32" to be useful, or 4/32" if the tire is 13-14". The average legal minimum tread depth is 2/32", but driving becomes unsafe with such a tread. Besides, most dealerships require at least 4/32" tread to trade-in a car ...Select OEM Tire. Reference your vehicles placard inside of your driver's side door jamb. Be sure to read it closely including any tire size prefix or suffix such as a 'P' or 'LT'. Select the correct 'Tire Type' from the drop down, then enter your OEM tire size, load rating, and pressure listed on the card. Select NEW Tire.Performing the Penny Test for Tires. Place a penny in between 2 ribs on your tire with Lincoln’s head pointing down into the tread. If only part of his head is covered, it means your tires are in good shape. If you see his entire head, your tread is 2/32” or deeper and it’s time for a tire replacement. Part 1.Check your tire pressure before you leave. Check the pressure of your spare tire every once in a while, too. If you have a "space saver" spare, use the pressure rating on the sidewall of the tire. Remember how important tire pressure is, and be sure to check your tires at least once a month!When selecting the right tube size, you need to consider the exact number/measurement of the wheel diameter. For the tire width, the exact number isn't required as bike inner tubes stretch or expand.When you see a bicycle tube with this number - 26 x 1.75 - 2.4, the numbers 1.75 - 2.4 mean the tube will fit a tire width in the range of 1.75 to 2.4 inch.Tire Pressure Monitoring Systems (TPMS) work by using sensors located in the tires. These sensors measure the air pressure and communicate the information to the car's computer, triggering an alert if the pressure is too high or too low. In this article, we'll explore the fascinating world of TPMS, delving into its components, how it ...Example A : 33X12.50R15 The first number is your overall diameter of the tire. In this example the tire diameter or "height" is 33 inches tall. The second number represents the width of the tire. In most cases with inch measurement tires the width will have a .50 decimal after the initial number.Are you tired of purchasing rings online only to find out they don’t fit? Or perhaps you’ve experienced the frustration of visiting multiple jewelry stores, trying on countless rin...Maintaining optimal tire air pressure is key for vehicle safety and performance. The guide explains how to measure air pressure and includes a conversion chart for units like kg/cm², bars, and psi. Advice is provided for adjusting tire pressure in various driving scenarios, including highway travel, off-road, winter conditions, and when carrying heavy loads.Conventional wisdom suggests that, in good driving conditions, tire treads should be at least 2/32nds of an inch deep. On a U.S. penny, 2/32nds is also the same distance between the top of President Lincoln's head and the edge of the penny. To check tire tread with a penny, stick the edge of the penny in between your tire's treads.If you're looking for a good-looking, easy way to dole out chores, follow David Rios' example and create a chore wheel. If you're looking for a good-looking, easy way to dole out c...PCD = (distance between lug nuts) x 2 / number of lug nuts. For example, if you have a 5-lug wheel and the distance between the centers of two opposite lug nuts is 4.5 inches, the PCD would be: PCD = (4.5 inches) x 2 / 5 = 4.5 inches. Verify the Bolt Pattern Shape: Observe the arrangement of the lug nuts to determine the bolt pattern’s shape.As the rubber slowly wears away, the tread depth decreases. That limits your tires' ability to grip the road safely. You measure tire tread depth in fractions of an inch, generally 32nds, with most new tires starting with 10/32″ or 11/32″ of tread depth. When the tire tread reaches 2/32," the tires are considered unsafe.How to Measure Rim Width. Locate the Width Measuring Points: You want to measure the distance between the inner edges of the rim flanges (the outermost edges where the tire sits). Apply the Tape Measure: Place the tape measure across the rim for the width measurement. Again, ensure it's straight and taut.You can find plenty of commercial tire shine products, but they usually use chemicals that dry your tires or that you just do not want to breathe in. Making your own tire shine is ...To demonstrate the applicability of this property, we take a popular 200TW ultra-high performance tire and measure its vertical stiffness. This tire is the Bridgestone Potenza RE-71R 255/40R17 98W. Tire load-deflection. The tire is an elastic element that acts in series with the springs to modify the overall ride rate of the vehicle.Estimating Tire Pressure Based on Different Tire Temperature Measurement Points. 2024-01-5002. Knowing the tire pressure during driving is essential since it affects multiple tire properties such as rolling resistance, uneven wear, and how prone the tire is to tire bursts. Tire temperature and cavity pressure are closely tied to each other; a ...Tire measurement Crossword Clue. The Crossword Solver found 30 answers to "Tire measurement", 3 letters crossword clue. The Crossword Solver finds answers to classic crosswords and cryptic crossword puzzles. Enter the length or pattern for better results. Click the answer to find similar crossword clues . Enter a Crossword Clue. Sort by Length.This image shows the proper way to measure wheel width. Step 3 - Calculate the Wheel Size: Now it’s time to combine those two measurements. Typically, wheels are expressed as diameter x width. For example, if you measured a 16” diameter and an 8” width, then you have a 16” x 8” wheel.The ISO/ETRTO number appears as two digits separated with a hyphen from a set of three digits. For example, a tire that measures 26 x 1.75 inches has an ISO/ETRTO number of 47-559, while a tire measuring 700 x 23 mm is equal to 23-622. The first number gives the inside width of the tire, which can be compressed or expanded somewhat to fit a ...Here’s the formula: Backspacing = (Wheel Width / 2) + Offset + Center Hub Flange. Keep in mind that the wheel width should be measured from the innermost lip to the outermost lip, including the flanges. The offset should be in the same unit of measurement as the wheel width (usually inches or millimeters).1. Begin with finding the tire aspect ratio following the tire width. This is normally a two-digit number and is the numerical value that follows the forward-slash (/) in the tire code. For example, P225/50 R16 91V has an aspect ratio of 50. 2. Multiply the tire aspect ratio by 2 to get your section height (in inches).Tire pressure gauges measure the amount of air pressure in your tire. When you attach the gauge to the tire valve, the pressure inside the tire pushes a small rod out of the gauge, which is connected to a calibrated spring. The farther the rod extends, the higher the pressure inside the tire. The gauge then displays the pressure on a scale for ...There are a few different methods for measuring how car tires wear to get an estimate of the remaining tire life: Tire Wear Gauge. You can measure tire wear level easily with a tire depth gauge. These inexpensive tools are inserted into the deepest tread groove and measure the height of the adjacent tread block. There are several different ...Use the Conversion Factor: Multiply the millimeter measurement by 0.03937 (that's the magic number to turn millimeters into inches). Voila! You've Got Inches: Now you know the section width in inches. For example, if your tire's section width is 205mm: 305 mm x 0.03937 = 12.00 inches.Identify this length and multiply it by two for the diameter of your wheel (311 x 2 = 622mm). Measure the tire’s width by measuring from one side of the tire to the other. You now have all of the calculations needed for the ISO method. This measurement is listed with the tire’s width first, then the diameter (25-622).Maintaining a headspace between the tires and the ground will make the covering of tires easier, especially at the portion near the ground. 7. Measurement Each of the Tire's Diameter. Get a measuring tape or stick and measure the diameter of the tire. This means placing your stick parallel to the cross-section of the tire.This image shows the proper way to measure wheel width. Step 3 - Calculate the Wheel Size: Now it's time to combine those two measurements. Typically, wheels are expressed as diameter x width. For example, if you measured a 16" diameter and an 8" width, then you have a 16" x 8" wheel.The third option you may try is to measure the tread tire using a measuring gauge. The measuring gauge will generally measure up to 32nd of an inch and 25-28th in millimeters. Some gauges have a needle-like design with a portion of tread depth measure. It plays a vital role in metering the tread depth, as you need to measure different locations.Standard Trailer Tire Size. When looking at trailer tire sizes, you will first need to determine the rim's diameter. That way, you can limit your search to only a specific set of potentially suitable tires. As previously stated, there are 2 main trailer tire size groups—those that are 12 inches and under and those that are 13 inches and above.Prefer a rim by measuring diameter of tires. Follow the manufacturers’ approval rate to get the accurate width of the tire. Tire is available on different width which varies from 1 1/2 to 2’’, Tire manufacturers’ made different sizes width for different tires. Tip •Prior to buy a tire; think again and again about the load ratings.These numbers represent the tire width, sidewall height, and wheel diameter. Example: 235/45 18. Section Width (Tire Width) Aspect Ratio (Profile/Sidewall Height) Rim Diameter (Wheel Size) These aren’t the only tire size markings on the tire’s sidewall. There’s a lot more to tire size than a tire’s width and height.About this item. 1. Accurately measures tire tread depth gauge tool, Calibrated from 0 to 1 inch in 1/32 inch. 2. Color coded tire tread depth gauge clearly indicates the tire different phase by colors. 3. Tire tread depth gauge tool of Red range on bar: 0-3/32; Yellow Range on bar: 3/32 - 6/32; 5. Green Range on bar: 6/32-32/32.Dec 1, 2023 · If you’re looking to purchase a replacement tire, simply look along the sidewall of your current tire (check both sides). You’ll see something printed like “700x25mm” or “29x2.30 ...How To Measure Tire Tread. How to measure tire tread? Tire tread is one of the most important factors when it comes to vehicle safety and performance. Tire tread depth is a critical indicator of how well a tire can grip the road surface, while tread width can impact how well the tire flaps in the wind. Measurement of rolling resistance - the RoaDyn Accurate rim measurements are necessary to replace thHere's the step-by-step process: Calculate

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Backspacing is the measurement between the mounting surface of the wheel and the edge of the rim flange (not the bead). You can measure backspacing with a straight edge and a tape measure, or in the case of our photo, two straight edge rulers. One straight edge will lay across the outer edge of the wheel, to keep you from having to estimate how ...These pressure gauges have a ruler that will slide in and out to measure the air pressure. Best Overall Choice. 1. AstroAI Digital Tire Pressure Gauge. Check Latest Price. Coming from AstroAI, this digital tire pressure gauge has an ergonomic grip with a lit-up nozzle and led-display.Measure the air pressure when tires are cold. This means the vehicle has been parked for at least three hours, or driven less than 1 mile (1.6 km). If necessary, add or release air until the specified pressure is reached. If checked when hot, tire pressure can be as much as 4-6 psi (30-40 kPa, 0.3-0.4 kgf/cm2) higher than if checked when ...To accurately determine your bike tire size, you need to measure the diameter, width, and aspect ratio. First, measure the diameter by finding the distance between the two edges of the tire's inner rim. Advertisement. Next, measure the width by finding the distance between the two edges of the tire's tread.Never replace your tires with ones that have a lower load index than the original tires. You always want to have tires with the same, or higher load index. So, if you had tires with a load index of 92 to start off, you want tires with at least an index of 92 or higher. 7. Find the tire's speed rating.Dec 28, 2023 · Discover how different countries approach tire safety, learn the optimal times to replace your tires, and understand the nuances of tread depth for winter, summer, and all-season tires. We also delve into the practicalities of purchasing used tires and provide straightforward methods for accurately measuring tire tread depth.Tire circumference refers to the distance around the outer edge of a tire. It is the measurement of the length of the tire's circumference when it is fully inflated and mounted on a rim. Keep in mind that tire circumference can vary slightly based on factors such as tire wear, inflation pressure, and the specific design of the tire. Tire ...Measure the total width of the wheel, including the tire. Divide that number by 2 to find the centerline. For example, if your wheel and tire together are 10 inches wide, the centerline would be at 5 inches. Subtract the tire protrusion (step 3) from the centerline (step 4) to get your rim offset.To measure your tire pressure, remove the valve cap from each tire, press the gauge firmly onto the valve stem, and read the PSI or kPa value on the gauge. Repeat this for all four tires and ...LCD Display Tire Thread Measuring Gauge Digital Tire Depth Gauge Tire Tread Depth Gauge Digital Tread Depth Gauge Blue Tire Wear Gauge Tread Checker with Inch MM Conversion for Motorcycle Car Truck. 4.0 out of 5 stars. 272. 100+ bought in past month. $5.99 $ 5. 99. Typical: $6.59 $6.59.The wheel diameter is an essential measurement that determines the size of the tire’s wheel or rim. To measure the wheel diameter manually, follow these steps: Remove the wheel from your vehicle and place it on a flat, smooth surface like a table or the ground. Lay the wheel on its side, ensuring it is level and not tilted.The interactions between tires and roads are basic mechanisms that alter the dynamic states of vehicles. A fundamental understanding of tire-road interactions is clearly demanded in tire design to achieve performance improvements. The emergence of various tire sensors provides an opportunity to make accurate measurement of the physical quantities that are involved in tire-road interactions.US: Applicable for Different Vehicles: the tire thread measuring gauge is suitable for various vehicles, like car, truck, motorcycle, bus and other heavy transportation, helpful for accurately measuring the tire wear; The measuring result can remind you of the estimated remaining service life and replacing time of the tires, making you drive safelyAs the rubber slowly wears away, the tread depth decreases. That limits your tires' ability to grip the road safely. You measure tire tread depth in fractions of an inch, generally 32nds, with most new tires starting with 10/32″ or 11/32″ of tread depth. When the tire tread reaches 2/32," the tires are considered unsafe.Nov 27, 2019 · The Penny Test. The penny test (shown below) is the easy way to check a tire tread’s depth when you don’t have a depth gauge. If you place a penny in your tire’s tread groove with Lincoln’s face down and can see all of his face it’s time for new tires. But as you can see in the video, even 2/32 of an inch of tire tread isn’t a great ...In this case the tire's section width is 8.23". The tire's rim width range specification tells us that it can be mounted on a 15" wheel of any width between 5.5" and 7.5", so after applying the 2/10"s rule of thumb we can find out the corresponding change in approximate section width of the tire. Difference from Measuring Rim. Rim.Tires noise level rating typically consist of a three-digit number followed by a letter. The number represents the decibel (dB) level of the tire's noise emission, while the letter indicates the external rolling noise category. Lower dB numbers indicate quieter tires, while higher dB numbers indicate louder ones.A more accurate way to measure toe to within 1/16" Adjustable up to 70" in width. Easily done by one person. See Part # 79610 Tire Scribe. To get a very accurate toe measurement jack up front wheels and scribe a true running line on the face of the tire. Place the gauge in front of the tires and align the pointers with the scribe lines.1947. 1946. 1945. 1944. 1943. 1942. Or search by tire size. Explore our large online selection of tires and wheels for low prices. Enjoy free lifetime flat repairs and more when you choose Tireman.Wheels Up offers something for first-time private jet flyers to aircraft owners and everything in between. Here's a rundown on all of the membership options. Editor’s note: This is...The idea of the penny test is to check whether Once you have the circumference, you can easily calculate

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Yep, that's right—tiny fractions. Most tires start with a tread depth of about 10/32" or 11/32". When it gets down to about 2/32", it's time to think about getting new tires. Remember: New Tires: Usually around 10/32" or 11/32" deep. Time for New Tires: When they hit 2/32" or thereabouts. Other Methods For Measuring Tire Tread ...Backspacing is the measurement between the mounting surface of the wheel and the edge of the rim flange (not the bead). You can measure backspacing with a straight edge and a tape measure, or in the case of our photo, two straight edge rulers. One straight edge will lay across the outer edge of the wheel, to keep you from having to estimate how ...We list the top 10 places where you can sell or recycle used tires. Some are even open on Sundays! Find the best option inside. Although your tires may no longer be useful to you, ...Find authorized Goodyear tire shops near Trenton, New Jersey. Schedule an appointment for tire installation, oil change, or other vehicle repair services at your local tire store.Measuring the Outer Diameter. The outer diameter of a tire is essentially its size across the middle from one side to another. To get this measurement, start by placing your tape measure on the ground and line up your wheel with it. Then roll the bike forward until the tire completes one full rotation.Use our tire height chart to find tires in every size available from the top brands and compare tire prices online before you buy. Our tire height chart provides the answers to all your tire size questions quickly, just choose a wheel or tire diameter to find the correct tire height chart for the conversion you're looking for.Learn more about tire speed rating. Goodyear also offers high flotation tires. You will be able to choose your tire size, tire width, and tire rim size within the tire finder tool. Learn how to read your tire size from your local tire professionals. Contact us and let us help you find the right tire size for your vehicle.Measure from the middle of one stud to the outside of the second stud (skipping a stud). The number you see will be the actual measurement of the bolt pattern. So if you see 4 1/2 inches, you have a 5 on 4 1/2 ( also 5×4.5 and 5×114.3) bolt pattern. Other common bolt patterns are 5×4.75 and 5×5. Widget not in any sidebars.Digital Tire Tread Depth Gauge with 3 Modes: Fractional Inch, Decimal Inch and Millimeter, Tire Tread Depth Measuring Tool 0-1 Inch, Easy to Read Tread Depth Gauge for Motorcycles, Cars, SUV, Trucks. 3. $1299. Save 10% with coupon. FREE delivery Wed, May 8 on $35 of items shipped by Amazon.Tire Profile value is a percentage of the wheel diameter, typically between 35 and 55 it is the height of the tire sidewall. Often displayed as: 225/40R18. Width: Profile: Add another wheel . 17 x 7 ET48 205/45R17. 18 x 8 ET35 225/40R18 *The strut in diagram is only there for illustrative purposes, real distances will differ so make sure to ...measuring tire noise. This work resulted in Road Tire Noise Evaluation Procedure GMN 7079TP. In the early 2000s, while at Illingworth & Rodkin, Inc. of Petaluma, California, Donavan continued development of what is now the OBSI method for measuring tire-pavement noise. With the assistance of the California DepartmentA classic way to measure winter tire wear is to use a quarter. Insert a 25¢ Canadian coin in one of the grooves with the caribou facing down. If you see the tip of its nose, it means the tread depth no longer meets 6/32", so the tire probably won't last all winter or 10,000 km. Preventing premature wear: Tire pressure.Smartphone App to measure tire tread depth and other relevant information. All data are stored together with tire and vehicle information. The App will also provide the possibility to share tire pictures and insert information about tire status. What's New. Apr 28, 2023. Version 1.1.An easy to use tire size converter. You input the metric measurement and it spits it out in inches. We agree! So here you go. A tire size converter at your convenience everyday anytime you want. Just input either metric or inch measurements in the appropriate fields and click "convert" to instantly view tire conversions.As the rubber slowly wears away, the tread depth decreases. That limits your tires' ability to grip the road safely. You measure tire tread depth in fractions of an inch, generally 32nds, with most new tires starting with 10/32″ or 11/32″ of tread depth. When the tire tread reaches 2/32," the tires are considered unsafe.Rim size is a comprehensive measure involving several key dimensions and characteristics of a wheel, essential for tire selection and vehicle performance: Width (e.g., 7.5 in “7.5Jx16H2 ET 35”): The distance between the inner and outer edges of the rim. Diameter (e.g., 16 in “7.5Jx16H2 ET 35”): The size of the rim measured from one edge ...LT tires also come in two types, LT-Metric and LT High Flotation. Metric LT tires will look like metric sizes but will have an LT in the front of the size (LT285/70R17). High Flotation LT tires are your standard 'American' light truck tire sizes with inch measurements and the 'LT' usually at the end (35X12.50R20LT).We all know that having a good memory is important for success in life, but do you know how your memory measures up? Take this quick memory test to find out. Memory is the ability ...Checking tire pressure with a spring and piston tire-pressure gauge. Pressure measurement is the measurement of an applied force by a fluid ( liquid or gas) on a surface. Pressure is typically measured in units of force per unit of surface area. Many techniques have been developed for the measurement of pressure and vacuum.To accurately determine your bike tire size, you need to measure the diameter, width, and aspect ratio. First, measure the diameter by finding the distance between the two edges of the tire's inner rim. Advertisement. Next, measure the width by finding the distance between the two edges of the tire's tread.The tire rolling resistance coefficient is the ratio of the tire rolling resistance over the vertical load. Therefore, it is crucial to accurately measure the tire rolling resistance. To gain insight into rolling resistance coefficient, both model-based and test-based measurement approaches of tire rolling resistance have been investigated.The penny test is an accurate way to measure whether tire tread depth surpasses or falls short of 2/32nds of an inch, since 2/32nds of an inch is the universally standard distance between the top of Lincoln’s head and the edge of the coin (see above for an explanation of how to do the test).To demonstrate the applicability of this property, we take a popular 200TW ultra-high performance tire and measure its vertical stiffness. This tire is the Bridgestone Potenza RE-71R 255/40R17 98W. Tire load-deflection. The tire is an elastic element that acts in series with the springs to modify the overall ride rate of the vehicle. How To Measure Tread Depth With A Gauge. Insert the probe