245/75R17 tire size: 31.47 in tall
Diameter, sidewall, width and revs per mile for 245/75R17, the common sizes within 3% of its diameter, and what each one does to the speedometer.
245/75R17, in short: 31.47 in (799 mm) tall and 245 mm (9.65 in) wide, with a 7.23 in (183.8 mm) sidewall, for a 17-inch wheel. Circumference is 98.86 in, so it turns about 641 times per mile (calculated from the nominal size).
Calculated from the size: sidewall = 245 × 75% = 183.75 mm; diameter = 2 × 7.234 in + 17 in; revs per mile = 63,360 ÷ (π × diameter).
Sizes within 3% of 245/75R17
12 common sizes come within ±3% of 31.47 in: 6 on the same 17-inch wheel, 3 plus-size and 3 minus-size. The last column is what the speedometer shows when the vehicle, set up for 245/75R17, is doing a true 60 mph.
| Size | Fit | Diameter | Difference | Width | Sidewall | Revs/mile (calc.) | Speedometer at a true 60 |
|---|---|---|---|---|---|---|---|
| 245/75R17 | This size | 31.47 in | - | 245 mm | 7.23 in | 641 | 60.0 mph |
| 265/70R16 | Minus 1 | 30.61 in | -2.74% | 265 mm | 7.30 in | 659 | 61.7 mph |
| 265/75R16 | Minus 1 | 31.65 in | +0.58% | 265 mm | 7.82 in | 637 | 59.7 mph |
| 235/85R16 | Minus 1 | 31.73 in | +0.83% | 235 mm | 7.86 in | 636 | 59.5 mph |
| 265/65R17 | Same wheel | 30.56 in | -2.88% | 265 mm | 6.78 in | 660 | 61.8 mph |
| 255/70R17 | Same wheel | 31.06 in | -1.31% | 255 mm | 7.03 in | 649 | 60.8 mph |
| 265/70R17 | Same wheel | 31.61 in | +0.44% | 265 mm | 7.30 in | 638 | 59.7 mph |
| 235/80R17 | Same wheel | 31.80 in | +1.06% | 235 mm | 7.40 in | 634 | 59.4 mph |
| 255/75R17 | Same wheel | 32.06 in | +1.88% | 255 mm | 7.53 in | 629 | 58.9 mph |
| 275/70R17 | Same wheel | 32.16 in | +2.19% | 275 mm | 7.58 in | 627 | 58.7 mph |
| 255/65R18 | Plus 1 | 31.05 in | -1.33% | 255 mm | 6.53 in | 650 | 60.8 mph |
| 265/65R18 | Plus 1 | 31.56 in | +0.30% | 265 mm | 6.78 in | 639 | 59.8 mph |
| 275/65R18 | Plus 1 | 32.07 in | +1.93% | 275 mm | 7.04 in | 629 | 58.9 mph |
A taller tire makes the speedometer read low, a shorter one high. Plus-sizing keeps the diameter close by trading sidewall for wheel. Any replacement needs a load index at least as high as the vehicle's tire placard calls for, and a wheel width the tire is approved for.
245/75R17 compared
245/75R17 side by side with 255/75R17 and 285/70R17: dimension by dimension, and what the swap does to the speedometer.
245/75R17 vs 255/75R17
+1.88% diameter| 245/75R17 | 255/75R17 | Difference | |
|---|---|---|---|
| Overall diameter | 31.47 in | 32.06 in | +0.59 in (+1.9%) |
| Section width | 245 mm | 255 mm | +10 mm |
| Sidewall height | 7.23 in | 7.53 in | +0.30 in |
| Wheel diameter | 17 in | 17 in | +0 in |
| Circumference | 98.9 in | 100.7 in | +1.9 in |
| Revs per mile (calc.) | 641 | 629 | -12 |
255/75R17 is 1.9% taller than 245/75R17. At a true 60 mph the speedometer shows 58.9 mph (it reads low), and when it shows 60 you're doing 61.1 mph.
245/75R17 vs 285/70R17
+3.94% diameter| 245/75R17 | 285/70R17 | Difference | |
|---|---|---|---|
| Overall diameter | 31.47 in | 32.71 in | +1.24 in (+3.9%) |
| Section width | 245 mm | 285 mm | +40 mm |
| Sidewall height | 7.23 in | 7.85 in | +0.62 in |
| Wheel diameter | 17 in | 17 in | +0 in |
| Circumference | 98.9 in | 102.8 in | +3.9 in |
| Revs per mile (calc.) | 641 | 617 | -24 |
285/70R17 is 3.9% taller than 245/75R17. At a true 60 mph the speedometer shows 57.7 mph (it reads low), and when it shows 60 you're doing 62.4 mph.
Which vehicles come with 245/75R17
Vehicles sold in the US that have 245/75R17 as the standard size on these trims, with the page that lists it. The tire placard on the driver's door edge or post has the size, and the load and inflation, for the exact vehicle.
- Jeep Wrangler 2025 model year · Sport, Sport S (2- and 4-door, I4 and V6)Mavis Tire OE fitment page, 2025 Jeep Wrangler Sport S V6 (size flagged standard 'S')
- Jeep Wrangler Unlimited 2025 model year · Unlimited Sport, Unlimited Sport SMavis Tire OE fitment page, 2025 Jeep Wrangler Unlimited Sport S I4 (size flagged standard 'S')
Vehicles mostly picked from Carscoops: 2025 U.S. car sales, full-year top 25 (Car and Driver data, January 2026).
Questions about 245/75R17 tires
How tall is a 245/75R17 tire?
What is 245/75R17 in inches?
How many revolutions per mile does a 245/75R17 tire make?
What size can replace 245/75R17?
245/75R17 vs 255/75R17: what's the difference?
Which vehicles come with 245/75R17 tires?
How these numbers are worked out
- NHTSA: Tire safety, everything rides on it (reading the sidewall and the placard)
- Tire Rack: How do I calculate tire dimensions?
- Jalopnik: What the 3% rule means for your tires (April 2026)
Checked October 2026. Dimensions are nominal, calculated from the size designation. A real tire's diameter, width and revs per mile vary by brand, tread depth, rim width and load, so check the maker's spec sheet.
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