Tire Size Box

295/65R17 vs 295/70R17

295/70R17 compared with 295/65R17

+3.6% diameter, 0.0" width

295/70R17 is 33.26" tall vs 32.10". More than the 3% rule of thumb, so check carefully before switching.

32.1"17" rim7.5"11.6" wide
295/65R17 (solid) compared with 295/70R17 (dashed outline), drawn to scale

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

62.2 mph

295/70R17 is +1.16 inches (+3.6%) in overall diameter. That is more than the 3% most shops and makers recommend.

295/65R17295/70R17Difference%
Overall diameter32.10"33.26"+1.16"+3.6%
Section width11.61"11.61"0.00"0.0%
Sidewall height7.55"8.13"+0.58"+7.7%
Circumference100.84"104.49"+3.65"+3.6%
Revolutions per mile628.3606.4−21.9−3.5%

Speedometer difference

If your vehicle came with 295/65R17 and you fit 295/70R17, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.7 mph+0.7 mph
30 mph31.1 mph+1.1 mph
40 mph41.4 mph+1.4 mph
50 mph51.8 mph+1.8 mph
60 mph62.2 mph+2.2 mph
65 mph67.4 mph+2.4 mph
70 mph72.5 mph+2.5 mph
75 mph77.7 mph+2.7 mph
80 mph82.9 mph+2.9 mph

Each size on its own

Questions

Which is bigger, 295/65R17 or 295/70R17?
295/70R17 is taller by 1.16 inches (33.26" vs 32.10"). 295/65R17 is the same width.
Can I replace 295/65R17 with 295/70R17?
It is not recommended without checking carefully. The diameter difference is +3.6%, 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 295/65R17), your real speed is 62.2 mph. Your odometer will under-count miles by about 3.6%.
Will 295/70R17 lift my vehicle?
Ride height changes by half the diameter difference: +0.58 inches of ground clearance at the axle.

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