tireheight.com285/65R18 in inches
A 285/65R18 tire is 32.6″ tall and 11.2″ wide, and fits a 18″ wheel. In inches it is written 32.6×11.2R18.
How tall 285/65R18 tires really are
Heights published by BFGoodrich, General, Michelin, Mickey Thompson and Toyo for all 15 tires in this size. Their published revolutions per mile work out to 31.6–31.9″ under load (below).
Real 285/65R18 tires measure 32.56–33.40″, against 32.59″ from the size code. They run both taller and shorter than the size code.
- Mickey Thompson Baja Boss M/T33.40″ +0.81″
- Mickey Thompson Baja Boss A/T33.20″ +0.61″
- Mickey Thompson Baja Legend EXP33.00″ +0.41″
- Toyo Open Country M/T32.80″ +0.21″
- Toyo Open Country R/T32.80″ +0.21″
- BFGoodrich All-Terrain T/A KO3 · 232.60″ +0.01″
- BFGoodrich HD-Terrain T/A KT32.60″ +0.01″
- BFGoodrich Mud-Terrain T/A KM332.60″ +0.01″
- General Grabber A/TX32.60″ +0.01″
- Michelin Defender LTX M/S 2 · 232.60″ +0.01″
- Toyo Open Country R/T Pro32.60″ +0.01″
- Toyo Open Country A/T III32.56″ −0.03″
- Toyo Open Country R/T Trail32.56″ −0.03″
Published revs per mile (633–639) mean the tire rolls like a 31.6–31.9″ tire on the vehicle. Use this for speedometer calibration.
The lightest (Michelin Defender LTX M/S 2, XL) is 25.7 lb lighter per corner than the heaviest (Toyo Open Country M/T, LT E).
15 tires in 285/65R18
Sort by the spec you care about.
| Load | Revs/mi | Source | |||||
|---|---|---|---|---|---|---|---|
| Michelin Defender LTX M/S 2All-season | XL · 116T | 32.60 | 41.1 | 12.5 | 2,756 | 639 | Spec page |
| Michelin Defender LTX M/S 2All-season | LT E · 125S | 32.60 | 53.3 | 14.0 | 3,640 | 639 | Spec page |
| General Grabber A/TXAll-terrain | LT E · 125S | 32.60 | 54.7 | 16.0 | 3,640 | 637 | Spec page |
| Toyo Open Country A/T IIIAll-terrain | LT E · 125/122S | 32.56 | 55.0 | 16.5 | 3,640 | 638 | Spec page |
| Toyo Open Country R/T TrailRugged-terrain | LT E · 125/122Q | 32.56 | 56.2 | 16.5 | 3,640 | 638 | Spec page |
| Mickey Thompson Baja Legend EXPAll-terrain | LT E · 125Q | 33.00 | 58.0 | 18.5 | 3,640 | – | Spec page |
| BFGoodrich All-Terrain T/A KO3All-terrain | LT D · 121S | 32.60 | 58.5 | 15.0 | 3,195 | 639 | Spec page |
| Toyo Open Country R/TRugged-terrain | LT E · 125/122Q | 32.80 | 59.0 | 16.4 | 3,640 | 633 | Spec page |
| BFGoodrich All-Terrain T/A KO3All-terrain | LT E · 125S | 32.60 | 59.4 | 16.0 | 3,640 | 639 | Spec page |
| Toyo Open Country R/T ProRugged-terrain | LT E · 125/122Q | 32.60 | 61.4 | 17.1 | 3,640 | 638 | Spec page |
| Mickey Thompson Baja Boss A/TAll-terrain | LT E · 125Q | 33.20 | 64.0 | 18.5 | 3,640 | – | Spec page |
| Mickey Thompson Baja Boss M/TMud-terrain | LT E · 125Q | 33.40 | 64.0 | 19.0 | 3,640 | – | Spec page |
| BFGoodrich HD-Terrain T/A KT | LT E · 125Q | 32.60 | 64.5 | 18.0 | 3,640 | 639 | Spec page |
| BFGoodrich Mud-Terrain T/A KM3Mud-terrain | LT E · 125Q | 32.60 | 65.8 | 18.0 | 3,640 | 639 | Spec page |
| Toyo Open Country M/TMud-terrain | LT E · 125/122Q | 32.80 | 66.8 | 18.9 | 3,640 | 633 | Spec page |
Is 285/65R18 a 33-inch tire?
Yes. The size code works out to 32.59″, and the 15 tires here publish 32.56–33.40″, so people call it a 33.
All 33-inch tire sizes, on every wheel size.
A true 33×12.50R18 is 0.41″ taller on paper and 1.3″ wider.
Compare with nearby sizes
Differences in overall diameter, calculated from each size code.
How to read 285/65R18
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 18-inch wheel. Approved wheel widths run 8.0″ to 10.0″.
Each tire carries up to 3,640 lb (1,650 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 3,640 lb each, as published.
| Specification | Inches | Metric |
|---|---|---|
| Overall diameter | 32.59 | 828 mm |
| Section width | 11.22 | 285 mm |
| Sidewall height | 7.29 | 185.3 mm |
| Circumference | 102.4 | 2,600 mm |
| Revolutions per mile (calculated, unloaded) | 618.9 | 385 per km |
| Revolutions per mile (published by manufacturers) | 633–639 | 393–397 per km |
| Approved wheel width | 8.0–10.0 | 203–254 mm |
Speedometer error after switching to 285/65R18
Questions about 285/65R18
What is 285/65R18 in inches?
32.59 inches tall, 11.22 inches wide, on a 18-inch wheel. Written in inches, that is roughly 32.6×11.2R18.
How much does a 285/65R18 tire weigh?
Between 41.1 lb and 66.8 lb for the 15 tires listed here. The lightest is the Michelin Defender LTX M/S 2 (XL); the heaviest is the Toyo Open Country M/T (LT E).
What wheel width do I need for 285/65R18?
Manufacturers approve 8.0–10.0″ wide wheels for this size.
How many revolutions per mile does a 285/65R18 make?
Published figures run 633–639 revolutions per mile. The calculated figure is 618.9, but manufacturers measure the tire under load, where it rolls on a smaller radius.
What is the difference between P285/65R18 and LT285/65R18?
Passenger tires (1 here) are built for passenger loads, with max loads of 2756 lb. Light-truck tires (14 here) come in heavier load ranges with max loads of 3195–3640 lb, and are usually heavier with deeper tread.
How much taller is 285/65R18 than 245/75R18?
0.12 inches taller on paper (32.59″ vs 32.47″), which raises the axle about 0.06″. Your speedometer will read about 0.4% slow.