325/50R22 vs 33x12.50R22

325/50R22 is 1.8" taller than 33x12.50R22 (5.2%)

Diameter difference−5.16%diameter 34.80" → 33.00"
325/50R2233x12.50R22
325/50R2233x12.50R22Difference
Overall diameter34.80"33.00"−1.80"
Section width12.80"12.50"−0.30"
Sidewall height6.40"5.50"−0.90"
Circumference109.3"103.7"−5.6"
Revolutions per mile580611+32
Wheel diameter22"22"±0"

Speedometer

ShowsActualDiff
30 mph28.5 mph−1.5
45 mph42.7 mph−2.3
60 mph56.9 mph−3.1
70 mph66.4 mph−3.6
80 mph75.9 mph−4.1

Gear ratio to match

CurrentEquivalent
3.423.24
3.553.37
3.733.54
4.103.89

33x12.50R22 is 1.80" shorter than 325/50R22, a −5.16% 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 0.90" (half the diameter change), and the tire needs 0.90" less room above it.

325/50R22 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 22" wheel; the sidewall is 0.90" shorter on 33x12.50R22.

Details: 325/50R22 in inches · 33x12.50R22 in inches · change sizes in the calculator

FAQ

What is the difference between 325/50R22 and 33x12.50R22?

33x12.50R22 is 1.80" shorter (−5.16%) and 0.30" narrower than 325/50R22.

Will 33x12.50R22 change my speedometer?

Yes, by −5.16%. When the speedometer shows 60 mph you would be going 56.9 mph.

Can I replace 325/50R22 with 33x12.50R22?

It is a −5.2% diameter change, larger than the common 3% guideline, so check clearance and plan to recalibrate.