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Measure the tread width with a tape measure laid across the width of the tire. Immediately available tire sizes that are with in plus or minus 3 variance will be displayed.
Just type in a metric or standard size tire and click calculate.
Tire tread width calculator. Tire Size Guide Tire Rack this tire sizes section width is 225mm and that its section height is 50 of 225mm. By converting the 225mm to inches 225 254 886 and multiplying it by 50 50 we confirm that this tire size results in a tire section height of 443. If this tire were a P22570R16 size our calculation.
Use the tire calculator to populate a list of alternate tire sizes. Click on each size to see available tires in that size. Use our tire size calculator to calculate the diameter width sidewall circumference and revolutions per mile of any tire.
Just type in a metric or standard size tire and click calculate. Although laws of European countries mandate changing tyres with 16 mm tread depth the tests have shown that a tyre with a 3mm tread has 25 percent shorter braking distance on the wet than the one with 16 mm tread. This translates to an 8 m shorter braking distance when driving at 50 mph 80kmh.
For example appropriate tire widths for 60 rim are. 175 mm 185 mm 195 mm and 205 mm. The minimum tire width 175 mm designates the safe tire width 185mm and 195 mm are ideal tire widths and 205 mm is the maximum tire width.
The maximum tire width is not ideal because the tire tread is wider than the inside rim bead. For a passenger tire that is sized P22545R16 this tire fits on a 16 wheel rim the total tire section width is 225mm at the widest point. The sidewall height is 45 of the tread width for a total sidewall height of 10125mm.
Converted out the total dimensions for this wheel and tire would be a total heightdiameter of 2397. Measure the tread width with a tape measure laid across the width of the tire. Measure from the outer edge of the tread on one side to the outer edge on the other side.
Convert the measurement if necessary to allow convenient comparisons with prior forensic track measurements or tire chain requirements. Shop for Tires For the measurements of your Original Equipment OE tire or the current tire on your vehicle simply enter the size. Our calculator will provide you with the Sidewall Height Section Width Overall Diameter Circumference and Estimated Revolutions Per Mile.
There are tread wear indicator bars in the main grooves of the tire that become level with the tread surface at approximately 232 remaining tread. This is not recommended and tires at this depth should not be driven on long especially in the winter. 3-432 is a much more safe tread depth to replace tires at.
Tread Width Measuring Tread Width Measuring Tread width is typically thought of as a measurement between the outboard and inboard edges of a new tires tread design. Ideally it approximates the width of the tread that comes into contact with the road. Unfortunately measuring tire tread width isnt.
The Tire Rack tread width measurement tool helps us define how much of a rounded shoulders over-the-horizon tread width should be included in the measurement. We use a 20 long tool made with square tube featuring a 30 bend in the middle. Centering this tool on top of the tread design helps us approximate how much of the tread will be in.
To compare tire sizes first select your vehicle stock tire size. Immediately available tire sizes that are with in plus or minus 3 variance will be displayed. Select the tire sizes to compare to your stock size and click Compare Selected Sizes.
Tire diameter can vary slightly for each tire model. The listed diameters are from calculations based on the tire size. In our example the width is 205 millimeters.
That would be the 60 in our example. The aspect ratio is the percentage that compares the tires section height with the tires section width. So in this case the tires section height is 60 percent of the tires section width.
New tires typically start with a tread depth of 1032 to 1232 with some off-road tires topping 1532. New tire tread depth is the measurement typically published by tire manufacturers but its not the same as usable tire tread depth. Most states and tire manufacturers consider tires to be bald when one or more of their grooves are worn.
While standard SAE tire sizes are easy to understand a 35x1250-16 tire runs 35 inches tall by 125 inches wide for a 16 inch wheel many popular tires particularly those under 35 tall use harder to visualize metric dimensions a 31575R16 tire is 315 mm wide with a sidewall height that is 75 of the width for a 16 inch wheel. The 195 is the tire width in millimeters measured from the bottom of the bead to the bottom of the bead the 70 is the sidewall aspect ratio the ratio of sidewall height to tire width at the tread indicating that the sidewall height is 70 of the tread width and the 15 is the wheel rim diameter in inches. The dimensions of a 23535-19 tire are 93 wide section width 255 tall outside dia The section width is 235mm wide There are 254mm to an inch.
Tread Width Thread width is the measurement between the edges of a tires tread design. It gives the approximate size of the tires contact patch with the ground. The contact patch will change with vehicle weight and tire inflation Tread width will be a factor when trying to maximize traction.
This calculator will calculate an estimated tire diameter height from the standard information given on the sidewall. Width aspect ratio and wheel size. Actual tire sizes vary by manufacturer.
The stock 93 RX-7 tires were 2255016 225mm section width 50 aspect ratio 16 inch wheel. The industry rule of thumb is that for every 12 change in rim width the tires section width will correspondingly change by approximately 210. A tire in the P20560R15 size is measured on a 60 wide wheel and this size tire has an approved rim width range from 55 to 75 wide.