225/70R15 vs 235/60R15

225/70R15 is 1.3" taller than 235/60R15 (4.7%)

Diameter difference−4.74%diameter 27.40" → 26.10"
225/70R15235/60R15
225/70R15235/60R15Difference
Overall diameter27.40"26.10"−1.30"
Section width8.86"9.25"+0.39"
Sidewall height6.20"5.55"−0.65"
Circumference86.1"82.0"−4.1"
Revolutions per mile736773+37
Wheel diameter15"15"±0"

Speedometer

ShowsActualDiff
30 mph28.6 mph−1.4
45 mph42.9 mph−2.1
60 mph57.2 mph−2.8
70 mph66.7 mph−3.3
80 mph76.2 mph−3.8

Gear ratio to match

CurrentEquivalent
3.423.26
3.553.38
3.733.55
4.103.91

235/60R15 is 1.30" shorter than 225/70R15, a −4.74% 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 0.65" (half the diameter change), and the tire needs 0.65" less room above it.

235/60R15 is 0.39" wider. On the same wheel offset about half of that, 0.20", moves toward the suspension and half toward the fender.

Both fit a 15" wheel; the sidewall is 0.65" shorter on 235/60R15.

Details: 225/70R15 in inches · 235/60R15 in inches · change sizes in the calculator

FAQ

What is the difference between 225/70R15 and 235/60R15?

235/60R15 is 1.30" shorter (−4.74%) and 0.39" wider than 225/70R15.

Will 235/60R15 change my speedometer?

Yes, by −4.74%. When the speedometer shows 60 mph you would be going 57.2 mph.

Can I replace 225/70R15 with 235/60R15?

It is a −4.7% diameter change, larger than the common 3% guideline, so check clearance and plan to recalibrate.