275/50R22 vs 285/50R22

Q: Can I replace 275/50R22 with 285/50R22?

285/50R22 is a safe swap for 275/50R22 by the usual ±3% rule: the diameter differs by +1.20%.

285/50R22 is a safe swap for 275/50R22 by the usual ±3% rule: the diameter differs by +1.20%.

275/50R22 32.83" · 285/50R22 33.22" · drawn to scale

Side by side

	275/50R22	285/50R22	Difference
Overall diameter	32.83"	33.22"	+0.39" (+1.20%)
Section width	275 mm	285 mm	+10 mm
Sidewall	5.41"	5.61"	+0.20"
Rim	22"	22"	same
Circumference	103.1"	104.4"	+1.2"
Revs per mile	614	607	-7
Ride height	—	—	+0.20"
Speedometer reads 60 mph	60.0	60.7	+0.7 mph

Speedometer and odometer

With 285/50R22 on a car calibrated for 275/50R22, the speedometer reads 59.3 mph when you're really doing 60, and the odometer under-counts by 1.2%.

Speedo shows	Actual speed
30 mph	30.4 mph
45 mph	45.5 mph
60 mph	60.7 mph
70 mph	70.8 mph
80 mph	81.0 mph

Other sizes close to 275/50R22

Questions

Can I replace 275/50R22 with 285/50R22?

285/50R22 is a safe swap for 275/50R22 by the usual ±3% rule: the diameter differs by +1.20%.

What's the difference between 275/50R22 and 285/50R22?

285/50R22 is 0.39" taller and 10 mm wider; the sidewall is +0.20". At an indicated 60 mph you'd actually be doing 60.7 mph.

Will 285/50R22 fit on 275/50R22 wheels?

Both use a 22" rim, so the wheel diameter matches; check the wheel's width range for a 285 mm tire and the fender clearance.