tireheight.com42×13.50R17 in inches
A 42×13.50R17 tire is 42.0″ tall and 13.5″ wide, and fits a 17″ wheel.
How tall 42×13.50R17 tires really are
Heights published by Mickey Thompson and Toyo for all 4 tires in this size. Their published revolutions per mile work out to 40.6″ under load (below).
Real 42×13.50R17 tires measure 41.70–41.90″, against 42.00″ from the size code. Every one runs shorter than the size code.
- Mickey Thompson Baja Boss M/T41.90″ −0.10″
- Toyo Open Country M/T41.80″ −0.20″
- Toyo Open Country R/T Pro41.80″ −0.20″
- Mickey Thompson Baja Boss X41.70″ −0.30″
Published revs per mile (497) mean the tire rolls like a 40.6″ tire on the vehicle. Use this for speedometer calibration.
The lightest (Mickey Thompson Baja Boss M/T, LT C) is 6.7 lb lighter per corner than the heaviest (Toyo Open Country R/T Pro, LT C).
4 tires in 42×13.50R17
Sort by the spec you care about.
| Load | Revs/mi | Source | |||||
|---|---|---|---|---|---|---|---|
| Mickey Thompson Baja Boss M/TMud-terrain | LT C · 126P | 41.90 | 102.0 | 22.0 | 3,750 | – | Spec page |
| Mickey Thompson Baja Boss X | LT B · 119F | 41.70 | 104.0 | 22.0 | 3,000 | – | Spec page |
| Toyo Open Country M/TMud-terrain | LT C · 126P | 41.80 | 107.2 | 21.0 | 3,750 | 497 | Spec page |
| Toyo Open Country R/T ProRugged-terrain | LT C · 126P | 41.80 | 108.7 | 19.9 | 3,750 | 497 | Spec page |
Is a 42×13.50R17 really 42 inches tall?
Mostly. The name says 42″, and the 4 tires here publish 41.70–41.90″.
All 42-inch tire sizes, on every wheel size.
Compare with nearby sizes
Differences in overall diameter, calculated from each size code.
| Size | Diameter ″ | vs 42×13.50R17 | Difference |
|---|---|---|---|
| 40×12.50R17 | 40.00 | -2.00″ | -4.8% |
| 40×13.50R17 | 40.00 | -2.00″ | -4.8% |
| 40×13.50R18 | 40.00 | -2.00″ | -4.8% |
| 42×14.50R17 | 42.00 | 0.00″ | 0.0% |
How to read 42×13.50R17
42 inches tall, measured on the approved wheel. Flotation sizes give every number in inches.
13.50 inches across the widest point, or 343 mm.
Radial construction.
Mounts on a 17-inch wheel. Approved wheel widths run 9.0″ to 11.5″.
Marks a light truck (LT) tire.
Each tire carries up to 3,750 lb (1,700 kg) at its maximum pressure.
Rated for up to 93 mph sustained.
Printed separately as "LOAD RANGE C": a 6-ply rating, inflated up to 50 psi (standard load-range table). The load range C tires here carry up to 3,750 lb each, as published.
| Specification | Inches | Metric |
|---|---|---|
| Overall diameter | 42.00 | 1067 mm |
| Section width | 13.50 | 343 mm |
| Sidewall height | 12.50 | 317.5 mm |
| Circumference | 131.9 | 3,351 mm |
| Revolutions per mile (calculated, unloaded) | 480.2 | 298 per km |
| Revolutions per mile (published by manufacturers) | 497 | 309 per km |
| Approved wheel width | 9.0–11.5 | 229–292 mm |
Speedometer error after switching to 42×13.50R17
Questions about 42×13.50R17
What is 42×13.50R17 in inches?
42.00 inches tall, 13.50 inches wide, on a 17-inch wheel. Manufacturers publish 41.70–41.90 inches for the 4 tires listed here.
How much does a 42×13.50R17 tire weigh?
Between 102.0 lb and 108.7 lb for the 4 tires listed here. The lightest is the Mickey Thompson Baja Boss M/T (LT C); the heaviest is the Toyo Open Country R/T Pro (LT C).
What wheel width do I need for 42×13.50R17?
Manufacturers approve 9.0–11.5″ wide wheels for this size.
How many revolutions per mile does a 42×13.50R17 make?
Published figures run 497 revolutions per mile. The calculated figure is 480.2, but manufacturers measure the tire under load, where it rolls on a smaller radius.
How much taller is 42×13.50R17 than 40×13.50R17?
2.00 inches taller on paper (42.00″ vs 40.00″), which raises the axle about 1.00″. Your speedometer will read about 5.0% slow.