275/70R18 vs 295/70R18

295/70R18 is 1.1" taller than 275/70R18 (3.3%)

Diameter difference+3.32%diameter 33.16" → 34.26"
275/70R18295/70R18
275/70R18295/70R18Difference
Overall diameter33.16"34.26"+1.10"
Section width10.83"11.61"+0.79"
Sidewall height7.58"8.13"+0.55"
Circumference104.2"107.6"+3.5"
Revolutions per mile608589−20
Wheel diameter18"18"±0"

Speedometer

ShowsActualDiff
30 mph31.0 mph+1.0
45 mph46.5 mph+1.5
60 mph62.0 mph+2.0
70 mph72.3 mph+2.3
80 mph82.7 mph+2.7

Gear ratio to match

CurrentEquivalent
3.423.53
3.553.67
3.733.85
4.104.24

295/70R18 is 1.10" taller than 275/70R18, a +3.32% change in diameter. That is more than the 3% many tire shops use as a limit, so plan on recalibrating the speedometer and checking ABS and stability control.

Ground clearance changes by 0.55" (half the diameter change), and the tire needs 0.55" more room above it.

295/70R18 is 0.79" wider. On the same wheel offset about half of that, 0.39", moves toward the suspension and half toward the fender.

Both fit a 18" wheel; the sidewall is 0.55" taller on 295/70R18.

Details: 275/70R18 in inches · 295/70R18 in inches · change sizes in the calculator

FAQ

What is the difference between 275/70R18 and 295/70R18?

295/70R18 is 1.10" taller (+3.32%) and 0.79" wider than 275/70R18.

Will 295/70R18 change my speedometer?

Yes, by +3.32%. When the speedometer shows 60 mph you would be going 62.0 mph.

Can I replace 275/70R18 with 295/70R18?

It is a +3.3% diameter change, larger than the common 3% guideline, so check clearance and plan to recalibrate.