265/50R19 Tire Size in Inches

Diameter, width, sidewall and the closest equivalent sizes, computed from the size code.

265/50R19
29.4" tall × 10.4" wide
On a 19-inch wheel · roughly 29.4x10.4R19 in flotation sizing
MeasurementInchesMillimetres
Overall diameter29.43748
Section width10.43265
Sidewall height5.22132.5
Wheel diameter19483
Circumference92.52349
Revolutions per mile685 (426 per km)

What 265/50R19 means

265 is the section width in millimetres (10.4 in). 50 is the aspect ratio: the sidewall is 50% as tall as the tire is wide, which works out to 132.5 mm or 5.2 in. R19 is a radial tire for a 19-inch wheel.

Overall diameter is the wheel plus two sidewalls: 19 + 2 × 5.22 = 29.4 inches. These are the nominal dimensions every maker builds to; a real 265/50R19 can measure a few tenths of an inch differently by model and inflation.

Closest equivalent sizes

Common sizes within the usual 3% of 265/50R19's overall diameter. Confirm load index, speed rating and rim width before swapping.

SizeDiameterWidthChangeSpeedometer at 60
265/45R20 new wheels 29.4 in 10.4 in -0.1% really 59.9 mph
245/70R16 new wheels 29.5 in 9.6 in +0.2% really 60.1 mph
265/40R21 new wheels 29.3 in 10.4 in -0.3% really 59.8 mph
245/65R17 new wheels 29.5 in 9.6 in +0.4% really 60.2 mph
265/35R22 new wheels 29.3 in 10.4 in -0.4% really 59.7 mph
245/60R18 new wheels 29.6 in 9.6 in +0.5% really 60.3 mph

Speedometer if you switch to 265/45R20

Your speedometer stays calibrated for 265/50R19. With a shorter tire you travel slower than it shows.

Speedometer readsTrue speed
30 mph30.0 mph
45 mph44.9 mph
55 mph54.9 mph
65 mph64.9 mph
75 mph74.9 mph
Compare 265/50R19 with any size →

Shop 265/50R19 tires

Check the load index and speed rating on your door-jamb placard before you buy, especially for LT tires used for towing.

See 265/50R19 tires on Amazon →

As an Amazon Associate we earn from qualifying purchases.

Frequently Asked Questions

A 265/50R19 tire is 29.4 inches (748 mm) tall overall. That is the 19-inch wheel plus two sidewalls of 5.2 inches each (50% of the 265 mm section width). Expect a real tire to measure within a few tenths of an inch of this, depending on the model and inflation.

The section width is 265 mm, or 10.4 inches, measured sidewall to sidewall on the recommended rim width. The tread itself is narrower than that. In flotation sizing, 265/50R19 is roughly a 29.4x10.4R19.

265/45R20 is the closest common size, at -0.1% overall diameter (29.4 in against 29.4 in). Most makers treat about 3% as the limit for a swap without speedometer or clearance problems, but always confirm load index, speed rating and wheel width before changing size.

About 685 revolutions per mile (426 per kilometre), from its 29.4-inch rolling diameter. Real-world figures run slightly higher because a loaded tire squats. This number is what your speedometer and odometer are calibrated against.

Last updated: October 2, 2026

Compare any sizes

The full calculator compares up to three sizes with speedometer error, clearance change and a to-scale diagram.

Open the tire size calculator

Other 19-inch sizes

225/40R19 225/45R19 225/55R19 235/35R19 235/40R19 235/45R19 235/50R19 235/55R19 245/35R19 245/40R19 245/45R19 245/50R19 245/55R19 255/35R19 255/40R19 255/45R19 255/50R19 255/55R19 275/35R19 275/40R19 275/45R19 285/45R19 275/55R19 285/40R19