295/40R22 vs 275/45R22

Q: Can I replace 295/40R22 with 275/45R22?

275/45R22 is a safe swap for 295/40R22 by the usual ±3% rule: the diameter differs by +1.45%.

275/45R22 is a safe swap for 295/40R22 by the usual ±3% rule: the diameter differs by +1.45%.

295/40R22 31.29" · 275/45R22 31.74" · drawn to scale

Side by side

	295/40R22	275/45R22	Difference
Overall diameter	31.29"	31.74"	+0.45" (+1.45%)
Section width	295 mm	275 mm	-20 mm
Sidewall	4.65"	4.87"	+0.23"
Rim	22"	22"	same
Circumference	98.3"	99.7"	+1.4"
Revs per mile	645	635	-9
Ride height	—	—	+0.23"
Speedometer reads 60 mph	60.0	60.9	+0.9 mph

Speedometer and odometer

With 275/45R22 on a car calibrated for 295/40R22, the speedometer reads 59.1 mph when you're really doing 60, and the odometer under-counts by 1.4%.

Speedo shows	Actual speed
30 mph	30.4 mph
45 mph	45.7 mph
60 mph	60.9 mph
70 mph	71.0 mph
80 mph	81.2 mph

Other sizes close to 295/40R22

Questions

Can I replace 295/40R22 with 275/45R22?

275/45R22 is a safe swap for 295/40R22 by the usual ±3% rule: the diameter differs by +1.45%.

What's the difference between 295/40R22 and 275/45R22?

275/45R22 is 0.45" taller and 20 mm narrower; the sidewall is +0.23". At an indicated 60 mph you'd actually be doing 60.9 mph.

Will 275/45R22 fit on 295/40R22 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.