Tire Size Box

295/60R20 vs 295/65R20

295/65R20 compared with 295/60R20

+3.4% diameter, 0.0" width

295/65R20 is 35.10" tall vs 33.94". More than the 3% rule of thumb, so check carefully before switching.

33.9"20" rim7.0"11.6" wide
295/60R20 (solid) compared with 295/65R20 (dashed outline), drawn to scale

With 295/65R20 tires, when your speedometer says 60 mph you are really going

62.1 mph

295/65R20 is +1.16 inches (+3.4%) in overall diameter. That is more than the 3% most shops and makers recommend.

295/60R20295/65R20Difference%
Overall diameter33.94"35.10"+1.16"+3.4%
Section width11.61"11.61"0.00"0.0%
Sidewall height6.97"7.55"+0.58"+8.3%
Circumference106.62"110.26"+3.65"+3.4%
Revolutions per mile594.3574.6−19.7−3.3%

Speedometer difference

If your vehicle came with 295/60R20 and you fit 295/65R20, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.7 mph+0.7 mph
30 mph31.0 mph+1.0 mph
40 mph41.4 mph+1.4 mph
50 mph51.7 mph+1.7 mph
60 mph62.1 mph+2.1 mph
65 mph67.2 mph+2.2 mph
70 mph72.4 mph+2.4 mph
75 mph77.6 mph+2.6 mph
80 mph82.7 mph+2.7 mph

Each size on its own

Questions

Which is bigger, 295/60R20 or 295/65R20?
295/65R20 is taller by 1.16 inches (35.10" vs 33.94"). 295/60R20 is the same width.
Can I replace 295/60R20 with 295/65R20?
It is not recommended without checking carefully. The diameter difference is +3.4%, 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 295/65R20 change my speedometer?
When your speedometer reads 60 mph with 295/65R20 fitted (calibrated for 295/60R20), your real speed is 62.1 mph. Your odometer will under-count miles by about 3.4%.
Will 295/65R20 lift my vehicle?
Ride height changes by half the diameter difference: +0.58 inches of ground clearance at the axle.

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