tireheight.com255/85R16 in inches
A 255/85R16 tire is 33.1″ tall and 10.0″ wide, and fits a 16″ wheel. In inches it is written 33.1×10.0R16.
How tall 255/85R16 tires really are
Heights published by BFGoodrich and Toyo for all 3 tires in this size. Their published revolutions per mile work out to 32.1–32.6″ under load (below).
Real 255/85R16 tires measure 33.10–33.45″, against 33.07″ from the size code. Every one runs taller than the size code.
- Toyo Open Country M/T33.45″ +0.38″
- Toyo M-5533.39″ +0.32″
- BFGoodrich Mud-Terrain T/A KM333.10″ +0.03″
Published revs per mile (620–629) mean the tire rolls like a 32.1–32.6″ tire on the vehicle. Use this for speedometer calibration.
The lightest (BFGoodrich Mud-Terrain T/A KM3, LT E) is 2.8 lb lighter per corner than the heaviest (Toyo Open Country M/T, LT E).
3 tires in 255/85R16
Sort by the spec you care about.
Is 255/85R16 a 33-inch tire?
Yes. The size code works out to 33.07″, and the 3 tires here publish 33.10–33.45″, so people call it a 33.
All 33-inch tire sizes, on every wheel size.
A true 33×15.50R16 is 0.07″ shorter on paper and 5.5″ wider.
Compare with nearby sizes
Differences in overall diameter, calculated from each size code.
| Size | Diameter ″ | vs 255/85R16 | Difference |
|---|---|---|---|
| 305/70R16 | 32.81 | -0.26″ | -0.8% |
| 285/75R16 | 32.83 | -0.24″ | -0.7% |
| 33×15.50R16 | 33.00 | -0.07″ | -0.2% |
| 33×10.50R15 | 33.00 | -0.07″ | -0.2% |
| 33×12.50R15 | 33.00 | -0.07″ | -0.2% |
| 33×13.50R15 | 33.00 | -0.07″ | -0.2% |
| 33×15.50R15 | 33.00 | -0.07″ | -0.2% |
| 33×9.50R15 | 33.00 | -0.07″ | -0.2% |
| 255/80R17 | 33.06 | -0.00″ | -0.0% |
| 295/75R16 | 33.42 | +0.35″ | +1.1% |
How to read 255/85R16
Marks a light truck (LT) tire.
A percentage, not a measurement: the sidewall is 85% as tall as the tire is wide, which is 216.8 mm or 8.53 inches.
Radial construction.
Mounts on a 16-inch wheel. Approved wheel widths run 6.5″ to 8.5″.
Each tire carries up to 3,415 lb (1,550 kg) at its maximum pressure.
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 3,415 lb each, as published.
| Specification | Inches | Metric |
|---|---|---|
| Overall diameter | 33.07 | 840 mm |
| Section width | 10.04 | 255 mm |
| Sidewall height | 8.53 | 216.8 mm |
| Circumference | 103.9 | 2,639 mm |
| Revolutions per mile (calculated, unloaded) | 609.9 | 379 per km |
| Revolutions per mile (published by manufacturers) | 620–629 | 385–391 per km |
| Approved wheel width | 6.5–8.5 | 165–216 mm |
Speedometer error after switching to 255/85R16
Questions about 255/85R16
What is 255/85R16 in inches?
33.07 inches tall, 10.04 inches wide, on a 16-inch wheel. Written in inches, that is roughly 33.1×10.0R16.
How much does a 255/85R16 tire weigh?
Between 58.4 lb and 61.2 lb for the 3 tires listed here. The lightest is the BFGoodrich Mud-Terrain T/A KM3 (LT E); the heaviest is the Toyo Open Country M/T (LT E).
What wheel width do I need for 255/85R16?
Manufacturers approve 6.5–8.5″ wide wheels for this size.
How many revolutions per mile does a 255/85R16 make?
Published figures run 620–629 revolutions per mile. The calculated figure is 609.9, but manufacturers measure the tire under load, where it rolls on a smaller radius.
How much taller is 255/85R16 than 33×15.50R16?
0.07 inches taller on paper (33.07″ vs 33.00″), which raises the axle about 0.03″. Your speedometer will read about 0.2% slow.