275/60R20 vs 33x12.50R20
33x12.50R20 is a safe swap for 275/60R20 by the usual ±3% rule: the diameter differs by +0.02%.
Side by side
| 275/60R20 | 33x12.50R20 | Difference | |
|---|---|---|---|
| Overall diameter | 32.99" | 33.00" | +0.01" (+0.02%) |
| Section width | 275 mm | 318 mm | +43 mm |
| Sidewall | 6.50" | 6.50" | +0.00" |
| Rim | 20" | 20" | same |
| Circumference | 103.6" | 103.7" | +0.0" |
| Revs per mile | 611 | 611 | -0 |
| Ride height | — | — | +0.00" |
| Speedometer reads 60 mph | 60.0 | 60.0 | +0.0 mph |
Speedometer and odometer
With 33x12.50R20 on a car calibrated for 275/60R20, the speedometer reads 60.0 mph when you're really doing 60, and the odometer under-counts by 0.0%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.0 mph |
| 45 mph | 45.0 mph |
| 60 mph | 60.0 mph |
| 70 mph | 70.0 mph |
| 80 mph | 80.0 mph |
Other sizes close to 275/60R20
- 275/60R20 vs 275/55R20-3.28%
- 275/60R20 vs 275/65R20+3.28%
- 275/60R20 vs 265/60R20-1.43%
- 275/60R20 vs 305/55R20+0.66%
- 275/60R20 vs 285/55R20-1.97%
- 275/60R20 vs 285/60R20+1.43%
- 275/60R20 vs 295/60R20+2.86%
- 275/60R20 vs 295/55R20-0.66%
- 275/60R20 vs 285/65R20+4.83%
- 275/60R20 vs 245/60R20-4.30%
- 275/60R20 vs 305/50R20-2.98%
- 275/60R20 vs 255/60R20-2.86%
Questions
Can I replace 275/60R20 with 33x12.50R20?
33x12.50R20 is a safe swap for 275/60R20 by the usual ±3% rule: the diameter differs by +0.02%.
What's the difference between 275/60R20 and 33x12.50R20?
33x12.50R20 is 0.01" taller and 43 mm wider; the sidewall is +0.00". At an indicated 60 mph you'd actually be doing 60.0 mph.
Will 33x12.50R20 fit on 275/60R20 wheels?
Both use a 20" rim, so the wheel diameter matches; check the wheel's width range for a 318 mm tire and the fender clearance.