Tire Size Box

295/60R17 vs 295/70R17

295/70R17 compared with 295/60R17

+7.5% diameter, 0.0" width

295/70R17 is 33.26" tall vs 30.94". More than the 3% rule of thumb, so check carefully before switching.

30.9"17" rim7.0"11.6" wide
295/60R17 (solid) compared with 295/70R17 (dashed outline), drawn to scale

With 295/70R17 tires, when your speedometer says 60 mph you are really going

64.5 mph

295/70R17 is +2.32 inches (+7.5%) in overall diameter. That is more than the 3% most shops and makers recommend.

295/60R17295/70R17Difference%
Overall diameter30.94"33.26"+2.32"+7.5%
Section width11.61"11.61"0.00"0.0%
Sidewall height6.97"8.13"+1.16"+16.7%
Circumference97.19"104.49"+7.30"+7.5%
Revolutions per mile651.9606.4−45.5−7.0%

Speedometer difference

If your vehicle came with 295/60R17 and you fit 295/70R17, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.5 mph+1.5 mph
30 mph32.3 mph+2.3 mph
40 mph43.0 mph+3.0 mph
50 mph53.8 mph+3.8 mph
60 mph64.5 mph+4.5 mph
65 mph69.9 mph+4.9 mph
70 mph75.3 mph+5.3 mph
75 mph80.6 mph+5.6 mph
80 mph86.0 mph+6.0 mph

Each size on its own

Questions

Which is bigger, 295/60R17 or 295/70R17?
295/70R17 is taller by 2.32 inches (33.26" vs 30.94"). 295/60R17 is the same width.
Can I replace 295/60R17 with 295/70R17?
It is not recommended without checking carefully. The diameter difference is +7.5%, more than the 3% most shops and makers allow. It will throw off the speedometer and may affect ABS, stability control and clearance.
How much will 295/70R17 change my speedometer?
When your speedometer reads 60 mph with 295/70R17 fitted (calibrated for 295/60R17), your real speed is 64.5 mph. Your odometer will under-count miles by about 7.5%.
Will 295/70R17 lift my vehicle?
Ride height changes by half the diameter difference: +1.16 inches of ground clearance at the axle.

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