235/70R15 vs 275/60R15

275/60R15 is 0.0" taller than 235/70R15 (0.1%)

Diameter difference+0.14%diameter 27.95" → 27.99"
235/70R15275/60R15
235/70R15275/60R15Difference
Overall diameter27.95"27.99"+0.04"
Section width9.25"10.83"+1.57"
Sidewall height6.48"6.50"+0.02"
Circumference87.8"87.9"+0.1"
Revolutions per mile722720−1
Wheel diameter15"15"±0"

Speedometer

ShowsActualDiff
30 mph30.0 mph+0.0
45 mph45.1 mph+0.1
60 mph60.1 mph+0.1
70 mph70.1 mph+0.1
80 mph80.1 mph+0.1

Gear ratio to match

CurrentEquivalent
3.423.42
3.553.56
3.733.74
4.104.11

275/60R15 is 0.04" taller than 235/70R15, a +0.14% change in diameter, inside the 3% range most shops treat as a safe swap.

Ground clearance changes by 0.02" (half the diameter change), and the tire needs 0.02" more room above it.

275/60R15 is 1.57" wider. On the same wheel offset about half of that, 0.79", moves toward the suspension and half toward the fender.

Both fit a 15" wheel; the sidewall is 0.02" taller on 275/60R15.

Details: 235/70R15 in inches · 275/60R15 in inches · change sizes in the calculator

FAQ

What is the difference between 235/70R15 and 275/60R15?

275/60R15 is 0.04" taller (+0.14%) and 1.57" wider than 235/70R15.

Will 275/60R15 change my speedometer?

Yes, by +0.14%. When the speedometer shows 60 mph you would be going 60.1 mph.

Can I replace 235/70R15 with 275/60R15?

Often yes: the diameter change of +0.1% is within the common 3% guideline. Check the load index, speed rating and clearance.