tireheight.com285/65R20 in inches
A 285/65R20 tire is 34.6″ tall and 11.2″ wide, and fits a 20″ wheel. In inches it is written 34.6×11.2R20.
How tall 285/65R20 tires really are
Heights published by BFGoodrich, General, Michelin, Mickey Thompson and Toyo for all 8 tires in this size. Their published revolutions per mile work out to 33.5–33.6″ under load (below).
Real 285/65R20 tires measure 34.50–34.60″, against 34.59″ from the size code. They run both taller and shorter than the size code.
Published revs per mile (601–602) mean the tire rolls like a 33.5–33.6″ tire on the vehicle. Use this for speedometer calibration.
The lightest (Toyo Open Country A/T III, LT E) is 12.7 lb lighter per corner than the heaviest (Mickey Thompson Baja Boss A/T, LT E).
8 tires in 285/65R20
Sort by the spec you care about.
| Load | Revs/mi | Source | |||||
|---|---|---|---|---|---|---|---|
| Toyo Open Country A/T IIIAll-terrain | LT E · 127/124S | 34.57 | 56.3 | 16.5 | 3,860 | 601 | Spec page |
| Toyo Open Country H/T IIHighway | LT E · 127/124R | 34.57 | 60.3 | 15.8 | 3,860 | 601 | Spec page |
| Toyo Open Country R/T TrailRugged-terrain | LT E · 127/124R | 34.60 | 60.6 | 16.5 | 3,860 | 601 | Spec page |
| Michelin Defender LTX PlatinumAll-season | LT E · 127S | 34.50 | 61.8 | 14.0 | 3,860 | 602 | Spec page |
| General Grabber A/TXAll-terrain | LT E · 127S | 34.60 | 62.9 | 17.0 | 3,860 | 601 | Spec page |
| BFGoodrich All-Terrain T/A KO3All-terrain | LT E · 127S | 34.60 | 64.3 | 16.0 | 3,860 | 602 | Spec page |
| BFGoodrich HD-Terrain T/A KT | LT E · 127Q | 34.60 | 68.5 | 18.0 | 3,860 | 602 | Spec page |
| Mickey Thompson Baja Boss A/TAll-terrain | LT E · 127Q | 34.60 | 69.0 | 18.5 | 3,860 | – | Spec page |
Is 285/65R20 a 35-inch tire?
Close. The size code works out to 34.59″, and the 8 tires here publish 34.50–34.60″, so people call it a 35.
All 35-inch tire sizes, on every wheel size.
A true 35×11.50R20 is 0.41″ taller on paper and 0.3″ wider.
Compare with nearby sizes
Differences in overall diameter, calculated from each size code.
| Size | Diameter ″ | vs 285/65R20 | Difference |
|---|---|---|---|
| 295/60R20 | 33.94 | -0.65″ | -1.9% |
| 275/65R20 | 34.07 | -0.51″ | -1.5% |
| 265/70R20 | 34.61 | +0.02″ | +0.1% |
| 315/60R20 | 34.88 | +0.30″ | +0.9% |
| 35×11.50R20 | 35.00 | +0.41″ | +1.2% |
| 35×12.50R20 | 35.00 | +0.41″ | +1.2% |
| 35×13.50R20 | 35.00 | +0.41″ | +1.2% |
| 35×15.50R20 | 35.00 | +0.41″ | +1.2% |
| 295/65R20 | 35.10 | +0.51″ | +1.5% |
| 325/60R20 | 35.35 | +0.77″ | +2.2% |
How to read 285/65R20
Marks a light truck (LT) tire.
A percentage, not a measurement: the sidewall is 65% as tall as the tire is wide, which is 185.3 mm or 7.29 inches.
Radial construction.
Mounts on a 20-inch wheel. Approved wheel widths run 8.0″ to 10.0″.
Each tire carries up to 3,860 lb (1,750 kg) at its maximum pressure.
Rated for up to 112 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 3,860 lb each, as published.
| Specification | Inches | Metric |
|---|---|---|
| Overall diameter | 34.59 | 879 mm |
| Section width | 11.22 | 285 mm |
| Sidewall height | 7.29 | 185.3 mm |
| Circumference | 108.7 | 2,760 mm |
| Revolutions per mile (calculated, unloaded) | 583.1 | 362 per km |
| Revolutions per mile (published by manufacturers) | 601–602 | 373–374 per km |
| Approved wheel width | 8.0–10.0 | 203–254 mm |
Speedometer error after switching to 285/65R20
Questions about 285/65R20
What is 285/65R20 in inches?
34.59 inches tall, 11.22 inches wide, on a 20-inch wheel. Written in inches, that is roughly 34.6×11.2R20.
How much does a 285/65R20 tire weigh?
Between 56.3 lb and 69.0 lb for the 8 tires listed here. The lightest is the Toyo Open Country A/T III (LT E); the heaviest is the Mickey Thompson Baja Boss A/T (LT E).
What wheel width do I need for 285/65R20?
Manufacturers approve 8.0–10.0″ wide wheels for this size.
How many revolutions per mile does a 285/65R20 make?
Published figures run 601–602 revolutions per mile. The calculated figure is 583.1, but manufacturers measure the tire under load, where it rolls on a smaller radius.
How much taller is 285/65R20 than 275/65R20?
0.51 inches taller on paper (34.59″ vs 34.07″), which raises the axle about 0.26″. Your speedometer will read about 1.5% slow.