tireheight.com315/60R20 in inches
A 315/60R20 tire is 34.9″ tall and 12.4″ wide, and fits a 20″ wheel. In inches it is written 34.9×12.4R20.
How tall 315/60R20 tires really are
Heights published by Toyo for the one tire in this size. Their published revolutions per mile work out to 34.0″ under load (below).
The one tire listed, the Toyo Open Country M/T, measures 35.00″: 0.12″ taller than the size code's 34.88″.
Published revs per mile (593) mean the tire rolls like a 34.0″ tire on the vehicle. Use this for speedometer calibration.
1 tire in 315/60R20
Sort by the spec you care about.
Is 315/60R20 a 35-inch tire?
Yes. The size code works out to 34.88″, and the 1 tire here publishes 35.00″, so people call it a 35.
All 35-inch tire sizes, on every wheel size.
A true 35×11.50R20 is 0.12″ taller on paper and 0.9″ narrower.
Compare with nearby sizes
Differences in overall diameter, calculated from each size code.
| Size | Diameter ″ | vs 315/60R20 | Difference |
|---|---|---|---|
| 275/65R20 | 34.07 | -0.81″ | -2.3% |
| 285/65R20 | 34.59 | -0.30″ | -0.8% |
| 265/70R20 | 34.61 | -0.28″ | -0.8% |
| 35×11.50R20 | 35.00 | +0.12″ | +0.3% |
| 35×12.50R20 | 35.00 | +0.12″ | +0.3% |
| 35×13.50R20 | 35.00 | +0.12″ | +0.3% |
| 35×15.50R20 | 35.00 | +0.12″ | +0.3% |
| 295/65R20 | 35.10 | +0.22″ | +0.6% |
| 325/60R20 | 35.35 | +0.47″ | +1.4% |
| 285/70R20 | 35.71 | +0.83″ | +2.4% |
How to read 315/60R20
Marks a light truck (LT) tire.
A percentage, not a measurement: the sidewall is 60% as tall as the tire is wide, which is 189.0 mm or 7.44 inches.
Radial construction.
Mounts on a 20-inch wheel. Approved wheel widths run 8.5″ to 11.0″.
Each tire carries up to 3,640 lb (1,650 kg) on its own, or 3,305 lb (1,500 kg) each when paired on a dual rear axle.
Rated for up to 99 mph sustained.
Printed separately as "LOAD RANGE E": a 10-ply rating, inflated up to 80 psi (standard load-range table). The load range E tires here carry up to 3,640 lb each, as published.
| Specification | Inches | Metric |
|---|---|---|
| Overall diameter | 34.88 | 886 mm |
| Section width | 12.40 | 315 mm |
| Sidewall height | 7.44 | 189.0 mm |
| Circumference | 109.6 | 2,783 mm |
| Revolutions per mile (calculated, unloaded) | 578.2 | 359 per km |
| Revolutions per mile (published by manufacturers) | 593 | 368 per km |
| Approved wheel width | 8.5–11.0 | 216–279 mm |
Speedometer error after switching to 315/60R20
Questions about 315/60R20
What is 315/60R20 in inches?
34.88 inches tall, 12.40 inches wide, on a 20-inch wheel. Written in inches, that is roughly 34.9×12.4R20.
What wheel width do I need for 315/60R20?
Manufacturers approve 8.5–11.0″ wide wheels for this size.
How many revolutions per mile does a 315/60R20 make?
Published figures run 593 revolutions per mile. The calculated figure is 578.2, but manufacturers measure the tire under load, where it rolls on a smaller radius.
How much taller is 315/60R20 than 265/70R20?
0.28 inches taller on paper (34.88″ vs 34.61″), which raises the axle about 0.14″. Your speedometer will read about 0.8% slow.