245/50R19 vs 265/50R19

Q: Can I replace 245/50R19 with 265/50R19?

265/50R19 is a safe swap for 245/50R19 by the usual ±3% rule: the diameter differs by +2.75%.

265/50R19 is a safe swap for 245/50R19 by the usual ±3% rule: the diameter differs by +2.75%.

245/50R19 28.65" · 265/50R19 29.43" · drawn to scale

Side by side

	245/50R19	265/50R19	Difference
Overall diameter	28.65"	29.43"	+0.79" (+2.75%)
Section width	245 mm	265 mm	+20 mm
Sidewall	4.82"	5.22"	+0.39"
Rim	19"	19"	same
Circumference	90.0"	92.5"	+2.5"
Revs per mile	704	685	-19
Ride height	—	—	+0.39"
Speedometer reads 60 mph	60.0	61.6	+1.6 mph

Speedometer and odometer

With 265/50R19 on a car calibrated for 245/50R19, the speedometer reads 58.4 mph when you're really doing 60, and the odometer under-counts by 2.7%.

Speedo shows	Actual speed
30 mph	30.8 mph
45 mph	46.2 mph
60 mph	61.6 mph
70 mph	71.9 mph
80 mph	82.2 mph

Other sizes close to 245/50R19

Questions

Can I replace 245/50R19 with 265/50R19?

265/50R19 is a safe swap for 245/50R19 by the usual ±3% rule: the diameter differs by +2.75%.

What's the difference between 245/50R19 and 265/50R19?

265/50R19 is 0.79" taller and 20 mm wider; the sidewall is +0.39". At an indicated 60 mph you'd actually be doing 61.6 mph.

Will 265/50R19 fit on 245/50R19 wheels?

Both use a 19" rim, so the wheel diameter matches; check the wheel's width range for a 265 mm tire and the fender clearance.