A 195/50R15 tire is 22.7″ tall and 7.7″ wide, and fits a 15″ wheel. In inches it is written 22.7×7.7R15.
Heights published by Toyo for all 5 tires in this size. Their published revolutions per mile work out to 22.1–22.2″ under load (below).
Real 195/50R15 tires measure 22.70–22.84″, against 22.68″ from the size code. Every one runs taller than the size code.
Published revs per mile (910–914) mean the tire rolls like a 22.1–22.2″ tire on the vehicle. Use this for speedometer calibration.
The lightest (Toyo Extensa HP II, XL) is 3.5 lb lighter per corner than the heaviest (Toyo Proxes R1R, SL).
Sort by the spec you care about.
| Load | Revs/mi | Source | |||||
|---|---|---|---|---|---|---|---|
| Toyo Extensa HP IIPerformance | XL · 86V | 22.72 | 16.1 | 8.9 | 1,168 | 914 | Spec page |
| Toyo Proxes Sport RPerformance | XL · 86V | 22.70 | 18.7 | 7.2 | 1,168 | 914 | Spec page |
| Toyo Proxes R888RPerformance | SL · 82V | 22.72 | 19.3 | 6.3 | 1,047 | 914 | Spec page |
| Toyo Observe G3-IceWinter | SL · 82T | 22.72 | 19.4 | 11.3 | 1,047 | 914 | Spec page |
| Toyo Proxes R1RPerformance | SL · 82V | 22.84 | 19.6 | 8.2 | 1,047 | 910 | Spec page |
Yes. The size code works out to 22.68″, and the 5 tires here publish 22.70–22.84″, so people call it a 23.
Differences in overall diameter, calculated from each size code.
A percentage, not a measurement: the sidewall is 50% as tall as the tire is wide, which is 97.5 mm or 3.84 inches.
Radial construction.
Mounts on a 15-inch wheel. Approved wheel widths run 5.5″ to 7.0″.
Each tire carries up to 1,168 lb (530 kg) at its maximum pressure.
Rated for up to 149 mph sustained.
Printed after the size. In this size the XL tires carry up to 1,168 lb each and the standard-load tires up to 1,047 lb, as published.
| Specification | Inches | Metric |
|---|---|---|
| Overall diameter | 22.68 | 576 mm |
| Section width | 7.68 | 195 mm |
| Sidewall height | 3.84 | 97.5 mm |
| Circumference | 71.2 | 1,810 mm |
| Revolutions per mile (calculated, unloaded) | 889.4 | 553 per km |
| Revolutions per mile (published by manufacturers) | 910–914 | 565–568 per km |
| Approved wheel width | 5.5–7.0 | 140–178 mm |
22.68 inches tall, 7.68 inches wide, on a 15-inch wheel. Written in inches, that is roughly 22.7×7.7R15.
Between 16.1 lb and 19.6 lb for the 5 tires listed here. The lightest is the Toyo Extensa HP II (XL); the heaviest is the Toyo Proxes R1R (SL).
Manufacturers approve 5.5–7.0″ wide wheels for this size.
Published figures run 910–914 revolutions per mile. The calculated figure is 889.4, but manufacturers measure the tire under load, where it rolls on a smaller radius.
0.77 inches taller on paper (22.68″ vs 21.91″), which raises the axle about 0.38″. Your speedometer will read about 3.5% slow.