255/30R22 vs 265/35R22
265/35R22 is outside the ±3% rule as a replacement for 255/30R22: the diameter differs by +4.57%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 265/35R22 on a car calibrated for 255/30R22, the speedometer reads 57.4 mph when you're really doing 60, and the odometer under-counts by 4.6%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.4 mph |
| 45 mph | 47.1 mph |
| 60 mph | 62.7 mph |
| 70 mph | 73.2 mph |
| 80 mph | 83.7 mph |
Other sizes close to 255/30R22
Questions
Can I replace 255/30R22 with 265/35R22?
265/35R22 is outside the ±3% rule as a replacement for 255/30R22: the diameter differs by +4.57%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 255/30R22 and 265/35R22?
265/35R22 is 1.28" taller and 10 mm wider; the sidewall is +0.64". At an indicated 60 mph you'd actually be doing 62.7 mph.
Will 265/35R22 fit on 255/30R22 wheels?
Both use a 22" rim, so the wheel diameter matches; check the wheel's width range for a 265 mm tire and the fender clearance.