325/70R17 vs 35x12.50R17

35x12.50R17 is 0.1" taller than 325/70R17 (0.2%)

Diameter difference+0.25%diameter 34.91" → 35.00"
325/70R1735x12.50R17
325/70R1735x12.50R17Difference
Overall diameter34.91"35.00"+0.09"
Section width12.80"12.50"−0.30"
Sidewall height8.96"9.00"+0.04"
Circumference109.7"110.0"+0.3"
Revolutions per mile578576−1
Wheel diameter17"17"±0"

Speedometer

ShowsActualDiff
30 mph30.1 mph+0.1
45 mph45.1 mph+0.1
60 mph60.1 mph+0.1
70 mph70.2 mph+0.2
80 mph80.2 mph+0.2

Gear ratio to match

CurrentEquivalent
3.423.43
3.553.56
3.733.74
4.104.11

35x12.50R17 is 0.09" taller than 325/70R17, a +0.25% change in diameter, inside the 3% range most shops treat as a safe swap.

Ground clearance changes by 0.04" (half the diameter change), and the tire needs 0.04" more room above it.

325/70R17 is 0.30" wider. On the same wheel offset about half of that, 0.15", moves toward the suspension and half toward the fender.

Both fit a 17" wheel; the sidewall is 0.04" taller on 35x12.50R17.

Details: 325/70R17 in inches · 35x12.50R17 in inches · change sizes in the calculator

FAQ

What is the difference between 325/70R17 and 35x12.50R17?

35x12.50R17 is 0.09" taller (+0.25%) and 0.30" narrower than 325/70R17.

Will 35x12.50R17 change my speedometer?

Yes, by +0.25%. When the speedometer shows 60 mph you would be going 60.1 mph.

Can I replace 325/70R17 with 35x12.50R17?

Often yes: the diameter change of +0.2% is within the common 3% guideline. Check the load index, speed rating and clearance.