Data sheet TS-235/75R15 · Size
235/75R15 in inches
235/75R15 measures 28.9 in (734 mm) overall diameter by the formula. Section width is 9.3 in (235 mm) and it makes 698 revolutions per mile.
Fig. 1 — Cross-section
Table 1 — Nominal dimensions
| Item | in | mm |
|---|---|---|
| DOverall diameter | 28.88 | 734 |
| ASection width | 9.25 | 235 |
| BSidewall | 6.94 | 176.3 |
| CRim | 15 | 381.0 |
| Circumference | 90.7 | 2,304 |
| Revs per mile · km | 698 | 434 |
| Flotation size printed | 29X9.00R15 | Mickey Thompson |
|---|---|---|
| Measuring rim | 6.5″ | Kumho LT |
| Approved rims | 6.0–7.0, 6.0–8.0″ | 4 LT tires |
Table 2 — Measured range
28.80–29.10″overall diameter, 12 tires from 4 makers (math: 28.88″)
34–40 lbweight, 4 LT versions
10.0–19.0/32″new tread depth
1,985 lbmax load per tire, 3 of 4 LT versions list it, as published
4 LT · 8 Pversions in the makers’ tables we read
All 12 tires ↓Table 3
12 tires in 235/75R15, as published
One row per model and type, from each maker’s size table. LT first, then P-metric; sorted by diameter.
The math says 28.88″. 12 tires from 4 makers measure 28.80″–29.10″. Tallest here: Toyo Open Country A/T III (all-terrain), 29.10″. Check the maker’s number before you buy for a tight fit.
| Tire | Type | Diameter | Width | Rims, in | Weight | Tread | Max load |
|---|---|---|---|---|---|---|---|
| Firestone Destination M/T2firestonetire.com · Oct 15, 2026 | LT · C 104Q | 28.90″ | — | 6.0–7.0 | 39.7 lb | 19.0/32″ | — |
| Kumho Road Venture AT52kumhotireusa.com · Oct 15, 2026 | LT · C 104/101S | 28.90″ | 9.30″ | 6.0–8.0 | 33.9 lb | 16.0/32″ | 1,985 lb @ 50 psi |
| Kumho Crugen HT51kumhotireusa.com · Oct 15, 2026 | LT · C 104/101S | 28.90″ | 9.30″ | 6.0–7.0 | 34.3 lb | 14.5/32″ | 1,985 lb @ 50 psi |
| Toyo Open Country A/T IIItoyotires.com · Oct 15, 2026 | LT · C 104/101S | 29.10″ | 9.30″ | 6.0–8.0 | 37.0 lb | 16.0/32″ | 1,985 lb @ 50 psi |
| Mickey Thompson Baja Boss A/Tmickeythompsontires.com · Oct 15, 2026 | XL 109T | 28.80″ | 9.20″ | 6.0–8.0 | 36.0 lb | 16.0/32″ | 2,271 lb @ 50 psi |
| Firestone Destination A/T2firestonetire.com · Oct 15, 2026 | SL 105S | 28.90″ | — | 6.0–8.0 | 29.5 lb | 12.0/32″ | — |
| Firestone Destination LE3firestonetire.com · Oct 15, 2026 | XL 109T | 28.90″ | — | 6.0–8.0 | 27.7 lb | 10.0/32″ | — |
| Firestone Destination LE4firestonetire.com · Oct 15, 2026 | XL 109T | 28.90″ | — | 6.0–8.0 | 29.2 lb | 12.0/32″ | — |
| Kumho Road Venture AT52kumhotireusa.com · Oct 15, 2026 | XL 109T | 28.90″ | 9.30″ | 6.0–8.0 | 33.9 lb | 13.5/32″ | 2,271 lb @ 50 psi |
| Kumho Crugen HT51kumhotireusa.com · Oct 15, 2026 | XL 109T | 28.90″ | 9.30″ | 6.0–8.0 | 31.5 lb | 12.5/32″ | 2,271 lb @ 50 psi |
| Toyo Open Country A/T IIItoyotires.com · Oct 15, 2026 | XL 108T | 28.90″ | 9.30″ | 6.0–8.0 | 32.0 lb | 13.0/32″ | 2,183 lb @ 50 psi |
| Toyo Open Country H/T IItoyotires.com · Oct 15, 2026 | XL 109T | 28.90″ | 9.30″ | 6.0–8.0 | 33.0 lb | 11.8/32″ | 2,271 lb @ 50 psi |
§ 1
Nominal dimensions
By the formula 235/75R15 nominally measures 28.9 in (734 mm) overall diameter. Section width is 9.3 in (235 mm), sidewall height 6.9 in (176 mm) and rim 15 in (381 mm).
Circumference is 90.7 in (2,304 mm). Revolutions are 698 per mile (434 per km). These are unloaded nominal numbers; real tires measure slightly differently.
§ 2
What makers publish
Makers' size tables list 12 tires in 235/75R15 from four brands: Firestone, Kumho, Toyo and Mickey Thompson. The set includes 4 LT and 8 P-metric or passenger versions; listed load ranges include SL, XL and C.
Published overall diameters run from 28.8 in to 29.1 in against 28.88 in by the formula. Weights in those tables run from 27.7 lbs to 39.7 lbs, and new tread depths run from 10/32 in to 19/32 in.
- Firestone Destination M/T2 LT235/75R15: overall diameter 28.9 in; weight 39.7 lbs; tread depth 19/32 in; load range C. (Firestone)
- Toyo Open Country A/T III LT235/75R15: overall diameter 29.1 in; weight 37 lbs; tread depth 16/32 in; 714 revs per mile. (Toyo)
- Mickey Thompson Baja Boss A/T 235/75R15: overall diameter 28.8 in; section width 9.2 in; weight 36 lbs; listed equivalent 29X9.00R15. (Mickey Thompson)
§ 3
Close size options
Sizes within ±3% overall diameter on similar rims include 235/70R16 (+0.3%), 255/65R16 (+0.6%) and 225/75R16 (+1.4%). The ±3% window is a tire-shop rule of thumb, not a law or vehicle maker specification.
Changing to nearby sizes alters indicated speed, revs per mile and axle ground clearance. For example, 235/70R16 is +0.3% (true speed 60.2 mph at a 60 mph indication; revolutions 697 per mile; axle clearance +0.04 in), and 255/65R16 is +0.6% (true speed 60.4 mph at a 60 mph indication; revolutions 694 per mile; axle clearance +0.09 in). See the speedometer calculator to compare other sizes.
Fig. 2
235/75R15 and the sizes next to it
To scale, on one ground line. Diameter by the formula.
Table 4
Compare 235/75R15 with another size
Type any size: diameter, sidewall, speedometer and clearance change against this one.
Comparison
31x10.50R15 is 31.00″ tall, +7.35% against 235/75R15. At 60 mph on the dial you drive 64.4 mph.
| Item | 235/75R15 | 31x10.50R15 | Change |
|---|---|---|---|
| Overall diameter | 28.88″ | 31.00″ | +2.12″ +7.35% |
| Section width | 9.25″ | 10.50″ | +1.25″ |
| Sidewall | 6.94″ | 8.00″ | +1.06″ |
| Circumference | 90.7″ | 97.4″ | +6.7″ |
| Revs per mile | 698 | 651 | −48 |
| Axle height | 14.44″ | 15.50″ | +1.06″ |
When the odometer counts 1,000 miles, you have driven 1,073.5 miles.
Engine RPM at the same road speed: −6.8%. Gear ratio calculator
Speedometer
| Dial shows | True speed | Difference |
|---|---|---|
| 30 mph | 32.2 mph | +2.2 |
| 45 mph | 48.3 mph | +3.3 |
| 60 mph | 64.4 mph | +4.4 |
| 70 mph | 75.1 mph | +5.1 |
| 80 mph | 85.9 mph | +5.9 |
235/75R1531x10.50R15
Note 1
P-metric or LT in the same size
Kumho Road Venture AT52 is published in both versions.
| Kumho Road Venture AT52 | P · 109T | LT · C · 104/101S |
|---|---|---|
| Overall diameter | 28.90″ | 28.90″ |
| Max load | 2,271 lb @ 50 psi | 1,985 lb @ 50 psi |
| Weight | 33.9 lb | 33.9 lb |
| Tread depth | 13.5/32″ | 16.0/32″ |
| Approved rims | 6.0–8.0″ | 6.0–8.0″ |
Source: Kumho size table, checked Oct 15, 2026. On trucks and SUVs, the load ratings of the tires on an axle must add up to at least the axle’s GAWR on the certification label (49 CFR 571.110).
Vehicles on 235/75R15: not listed yet. We add a vehicle here only from its maker’s own spec sheet for that year and trim.
The size your vehicle left the factory on is printed on the tire and loading placard on the driver’s door jamb (49 CFR 571.110). Pressure and load: that placard too.
Table 5
Within 3% of 235/75R15
Same rim or ±1″, diameter within 3%. A shop rule of thumb, not a law.
| Size | Diameter | Width | vs 235/75R15 | At 60 mph | Clearance |
|---|---|---|---|---|---|
| 235/70R16 | 28.95″ | 9.3″ | +0.3% | 60.2 | +0.04″ |
| 255/65R16 | 29.05″ | 10.0″ | +0.6% | 60.4 | +0.09″ |
| 225/75R16 | 29.29″ | 8.9″ | +1.4% | 60.9 | +0.20″ |
| 225/70R16 | 28.40″ | 8.9″ | −1.6% | 59.0 | −0.24″ |
| 225/75R15 | 28.29″ | 8.9″ | −2.0% | 58.8 | −0.30″ |
| 245/70R16 | 29.50″ | 9.6″ | +2.2% | 61.3 | +0.31″ |
| 235/65R16 | 28.03″ | 9.3″ | −2.9% | 58.2 | −0.43″ |
Q&A
Common questions
What is the diameter of 235/75R15?
By the size formula 235/75R15 is 28.9 in (734 mm) overall diameter and 698 revolutions per mile.
How much do maker measurements vary?
Published overall diameters for 235/75R15 run from 28.8 in to 29.1 in, about −0.3% to +0.8% versus the formula.
What load ranges exist for this size?
Size tables list load ranges SL, XL and C for 235/75R15; some entries are LT and some are P-metric. See the tire sidewall for the load range and maximum load marking (49 CFR 571.139).
Where do I find the correct inflation pressure?
See the tire and loading placard on the driver's door jamb for the vehicle maker’s recommended cold inflation pressures (49 CFR 571.110).
Notes
Method and sources
Each number and rule comes from a source with the date it was checked.
- Sidewall = width × aspect ratio ÷ 100
- Diameter = rim × 25.4 + 2 × sidewall (mm)
- Revs per mile = 63,360 ÷ (π × diameter, in)
- True speed = dial × new diameter ÷ old diameter
- Clearance change = half the diameter change
Numbers are nominal: the tire unloaded, on its measuring rim. Revs per mile published by makers run higher than the formula. “Within 3%” is a rule of thumb tire shops use, not a law. Tire pressure: the placard on your door jamb.
- Firestone: size table (firestonetire.com)checked Oct 15, 2026
- Toyo: size table (toyotires.com)checked Oct 15, 2026
- Mickey Thompson: size table (mickeythompsontires.com)checked Oct 15, 2026
- 49 CFR 571.139 (FMVSS No. 139), S5.5(d)ecfr.gov · checked Oct 15, 2026
- 49 CFR 571.110 (FMVSS No. 110), S4.3ecfr.gov · checked Oct 15, 2026
Related
Calculators and size classes
- Tire size calculatorTwo sizes: diameter, sidewall, revs and speedometer.
- Compare up to 4 sizesUp to four sizes side by side, drawn to scale.
- Metric ↔ inchesMetric to inches, and 33x12.50R20 to metric.
- Speedometer errorTrue speed after a size change.
- Gear ratio and RPMEngine RPM and the ratio to regear to.
- Wheel offset and pokeBackspacing, poke and inner clearance.
- DOT date codeHow old a tire is, from the DOT number.
- Load index chartLoad index in pounds and kilograms.
- Bolt patternMeasure it, convert inches to mm.
- Rim size and tire fitWhat 17x8 ET35 means, which sizes go on it.
- What fits my carStart from the placard on the door.
- Tire size chartCommon sizes in inches, by rim.