205/70R15 vs 215/65R15

205/70R15 is 0.3" taller than 215/65R15 (1.1%)

Diameter difference−1.12%diameter 26.30" → 26.00"
205/70R15215/65R15
205/70R15215/65R15Difference
Overall diameter26.30"26.00"−0.30"
Section width8.07"8.46"+0.39"
Sidewall height5.65"5.50"−0.15"
Circumference82.6"81.7"−0.9"
Revolutions per mile767776+9
Wheel diameter15"15"±0"

Speedometer

ShowsActualDiff
30 mph29.7 mph−0.3
45 mph44.5 mph−0.5
60 mph59.3 mph−0.7
70 mph69.2 mph−0.8
80 mph79.1 mph−0.9

Gear ratio to match

CurrentEquivalent
3.423.38
3.553.51
3.733.69
4.104.05

215/65R15 is 0.30" shorter than 205/70R15, a −1.12% change in diameter, inside the 3% range most shops treat as a safe swap.

Ground clearance changes by 0.15" (half the diameter change), and the tire needs 0.15" less room above it.

215/65R15 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 0.15" shorter on 215/65R15.

Details: 205/70R15 in inches · 215/65R15 in inches · change sizes in the calculator

FAQ

What is the difference between 205/70R15 and 215/65R15?

215/65R15 is 0.30" shorter (−1.12%) and 0.39" wider than 205/70R15.

Will 215/65R15 change my speedometer?

Yes, by −1.12%. When the speedometer shows 60 mph you would be going 59.3 mph.

Can I replace 205/70R15 with 215/65R15?

Often yes: the diameter change of −1.1% is within the common 3% guideline. Check the load index, speed rating and clearance.