tireheight.com185/65R15 in inches
A 185/65R15 tire is 24.5″ tall and 7.3″ wide, and fits a 15″ wheel. In inches it is written 24.5×7.3R15.
How tall 185/65R15 tires really are
Heights published by BFGoodrich, General, Michelin and Toyo for all 10 tires in this size. Their published revolutions per mile work out to 23.7–23.8″ under load (below).
Real 185/65R15 tires measure 24.45–24.50″, against 24.47″ from the size code. They run both taller and shorter than the size code.
Published revs per mile (849–851) mean the tire rolls like a 23.7–23.8″ tire on the vehicle. Use this for speedometer calibration.
The lightest (General AltiMAX RT45, SL) is 4.0 lb lighter per corner than the heaviest (General AltiMAX Arctic X, XL).
10 tires in 185/65R15
Sort by the spec you care about.
| Load | Revs/mi | Source | |||||
|---|---|---|---|---|---|---|---|
| General AltiMAX RT45Touring | SL · 88T | 24.50 | 15.9 | 11.0 | 1,235 | 849 | Spec page |
| General AltiMAX RT45Touring | SL · 88H | 24.50 | 15.9 | 11.0 | 1,235 | 849 | Spec page |
| General AltiMAX365 AWTouring | SL · 88H | 24.50 | 15.9 | 11.0 | 1,235 | 849 | Spec page |
| Toyo Extensa A/S IIAll-season | SL · 88H | 24.45 | 16.6 | 11.0 | 1,235 | 850 | Spec page |
| General ReliaTrekTouring | SL · 88H | 24.50 | 16.8 | 11.0 | 1,235 | 849 | Spec page |
| Michelin X-Ice SnowWinter | XL · 92T | 24.45 | 17.9 | 10.5 | 1,389 | 851 | Spec page |
| Toyo Celsius IITouring | SL · 88H | 24.45 | 18.3 | 11.0 | 1,235 | 850 | Spec page |
| BFGoodrich Advantage ControlAll-season | SL · 88H | 24.45 | 18.7 | 11.5 | 1,235 | 851 | Spec page |
| Toyo Observe G3-IceWinter | SL · 88T | 24.45 | 19.6 | 11.3 | 1,235 | 850 | Spec page |
| General AltiMAX Arctic XWinter | XL · 92T | 24.50 | 19.9 | 12.0 | 1,389 | 849 | Spec page |
Is 185/65R15 a 24-inch tire?
Close. The size code works out to 24.47″, and the 10 tires here publish 24.45–24.50″, so people call it a 24.
Compare with nearby sizes
Differences in overall diameter, calculated from each size code.
How to read 185/65R15
A percentage, not a measurement: the sidewall is 65% as tall as the tire is wide, which is 120.3 mm or 4.73 inches.
Radial construction.
Mounts on a 15-inch wheel. Approved wheel widths run 5.0″ to 6.5″.
Each tire carries up to 1,235 lb (560 kg) at its maximum pressure.
Rated for up to 130 mph sustained.
| Specification | Inches | Metric |
|---|---|---|
| Overall diameter | 24.47 | 622 mm |
| Section width | 7.28 | 185 mm |
| Sidewall height | 4.73 | 120.3 mm |
| Circumference | 76.9 | 1,952 mm |
| Revolutions per mile (calculated, unloaded) | 824.2 | 512 per km |
| Revolutions per mile (published by manufacturers) | 849–851 | 528–529 per km |
| Approved wheel width | 5.0–6.5 | 127–165 mm |
Speedometer error after switching to 185/65R15
Questions about 185/65R15
What is 185/65R15 in inches?
24.47 inches tall, 7.28 inches wide, on a 15-inch wheel. Written in inches, that is roughly 24.5×7.3R15.
How much does a 185/65R15 tire weigh?
Between 15.9 lb and 19.9 lb for the 10 tires listed here. The lightest is the General AltiMAX RT45 (SL); the heaviest is the General AltiMAX Arctic X (XL).
What wheel width do I need for 185/65R15?
Manufacturers approve 5.0–6.5″ wide wheels for this size.
How many revolutions per mile does a 185/65R15 make?
Published figures run 849–851 revolutions per mile. The calculated figure is 824.2, but manufacturers measure the tire under load, where it rolls on a smaller radius.
How much taller is 185/65R15 than 235/50R15?
0.22 inches taller on paper (24.47″ vs 24.25″), which raises the axle about 0.11″. Your speedometer will read about 0.9% slow.