35x12.50R15 — ten inches of sidewall
The tallest tire the 15-inch wheel ever got, and the shape that comes with it.
Flotation (imperial) notation · Flotation (imperial)
- Overall diameter
- 35.00 in
- 889 mm
- Section width
- 12.50 in
- 318 mm
- Sidewall height
- 10.00 in
- 254 mm
- Aspect ratio
- 80.0%
- sidewall as a share of width
- Wheel diameter
- 15 in
- the hole in the middle
- Circumference
- 110.0 in
- 2793 mm
- Revolutions per mile
- 576.2
- geometric, not measured
- Revolutions per km
- 358.1
- geometric, not measured
- Typical load index
- 108–128
- 2205–3968 lb per tire
Flotation sizes are almost always LT construction, so they share the light-truck band. Speed symbols run low because the aggressive tread patterns these sizes are sold in are rated against heat build-up, not against sustained high speed.
The load-index range shown is the band this CLASS of size is typically produced in — not a list of what is in stock for this exact size today. Load index and speed symbol are printed on the sidewall of the specific tire you are holding, and the required minimum is on the placard of the specific vehicle you are fitting. Read both.
Nearest real sizes in metric notation, same wheel
- 235/75R1528.88 in tall-6.12 in
- 225/75R1528.29 in tall-6.71 in
- 215/75R1527.70 in tall-7.30 in
Compare any two sizes, including ones this site has no page for, in the comparison tool.
Platforms recorded with this size
The Jeep Wrangler TJ is the only vehicle here recorded with 35x12.50R15 among its upgrades. It is the largest size catalogued on a 15-inch wheel and the end of that wheel's range.
More rubber than metal
Subtract the wheel and halve the remainder and the figure is 10.00 in per side. Twenty of this tire's thirty-five inches of diameter are casing; fifteen are wheel.
Only 40x13.50R17, at 11.50 in, carries more in this catalogue. Two sizes tie with this one at 10.00 in — 37x12.50R17 and 37x13.50R17 — and both are two inches taller on two more inches of wheel, which is to say they achieve the same casing depth from a much larger starting point.
The derived aspect ratio here is 80, a figure the code never prints and which would read as a 1970s light-truck specification if it did.
What it costs from anything the TJ came with
| Coming from | Diameter | Step | Actual speed at an indicated 70 mph |
|---|---|---|---|
| 215/75R15 | 27.70 in | +7.30 in (26.37%) | 88.5 mph |
| 225/75R15 | 28.29 in | +6.71 in (23.73%) | 86.6 mph |
| 235/75R15 | 28.88 in | +6.12 in (21.20%) | 84.8 mph |
| 30x9.50R15 | 30.00 in | +5.00 in (16.67%) | 81.7 mph |
| 31x10.50R15 | 31.00 in | +4.00 in (12.90%) | 79.0 mph |
| 33x12.50R15 | 33.00 in | +2.00 in (6.06%) | 74.2 mph |
The top of that table is the largest single tire-size change anywhere on this site. Going from a factory 215/75R15 to these is more than a quarter of the original diameter, and it takes a hundred indicated miles to 126.4 real ones.
The last inch of width
33x12.50R15 already carries 12.50 in of section, so this size adds 2.00 in of height and no width at all. Below the 33 every rung of the 15-inch ladder trades an inch of each; from the 33 upward only height is on offer, because 12.50 in is where the wheel's range stopped widening. What a change of this scale does to gearing is worked through in the axle ratio basics reference.
Related
Class: Flotation (imperial). Every figure above is computed from the size code, not stored — see how these numbers are calculated.