Tire Size Box

295/60R18 vs 295/65R18

295/65R18 compared with 295/60R18

+3.6% diameter, 0.0" width

295/65R18 is 33.10" tall vs 31.94". More than the 3% rule of thumb, so check carefully before switching.

31.9"18" rim7.0"11.6" wide
295/60R18 (solid) compared with 295/65R18 (dashed outline), drawn to scale

With 295/65R18 tires, when your speedometer says 60 mph you are really going

62.2 mph

295/65R18 is +1.16 inches (+3.6%) in overall diameter. That is more than the 3% most shops and makers recommend.

295/60R18295/65R18Difference%
Overall diameter31.94"33.10"+1.16"+3.6%
Section width11.61"11.61"0.00"0.0%
Sidewall height6.97"7.55"+0.58"+8.3%
Circumference100.33"103.98"+3.65"+3.6%
Revolutions per mile631.5609.3−22.2−3.5%

Speedometer difference

If your vehicle came with 295/60R18 and you fit 295/65R18, 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 mph41.5 mph+1.5 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, 295/60R18 or 295/65R18?
295/65R18 is taller by 1.16 inches (33.10" vs 31.94"). 295/60R18 is the same width.
Can I replace 295/60R18 with 295/65R18?
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 295/65R18 change my speedometer?
When your speedometer reads 60 mph with 295/65R18 fitted (calibrated for 295/60R18), your real speed is 62.2 mph. Your odometer will under-count miles by about 3.6%.
Will 295/65R18 lift my vehicle?
Ride height changes by half the diameter difference: +0.58 inches of ground clearance at the axle.

Other comparisons