265/40R22 vs 275/40R22

Q: Can I replace 265/40R22 with 275/40R22?

275/40R22 is a safe swap for 265/40R22 by the usual ±3% rule: the diameter differs by +1.04%.

275/40R22 is a safe swap for 265/40R22 by the usual ±3% rule: the diameter differs by +1.04%.

265/40R22 30.35" · 275/40R22 30.66" · drawn to scale

Side by side

	265/40R22	275/40R22	Difference
Overall diameter	30.35"	30.66"	+0.31" (+1.04%)
Section width	265 mm	275 mm	+10 mm
Sidewall	4.17"	4.33"	+0.16"
Rim	22"	22"	same
Circumference	95.3"	96.3"	+1.0"
Revs per mile	665	658	-7
Ride height	—	—	+0.16"
Speedometer reads 60 mph	60.0	60.6	+0.6 mph

Speedometer and odometer

With 275/40R22 on a car calibrated for 265/40R22, the speedometer reads 59.4 mph when you're really doing 60, and the odometer under-counts by 1.0%.

Speedo shows	Actual speed
30 mph	30.3 mph
45 mph	45.5 mph
60 mph	60.6 mph
70 mph	70.7 mph
80 mph	80.8 mph

Other sizes close to 265/40R22

Questions

Can I replace 265/40R22 with 275/40R22?

275/40R22 is a safe swap for 265/40R22 by the usual ±3% rule: the diameter differs by +1.04%.

What's the difference between 265/40R22 and 275/40R22?

275/40R22 is 0.31" taller and 10 mm wider; the sidewall is +0.16". At an indicated 60 mph you'd actually be doing 60.6 mph.

Will 275/40R22 fit on 265/40R22 wheels?

Both use a 22" rim, so the wheel diameter matches; check the wheel's width range for a 275 mm tire and the fender clearance.