Data sheet TS-265/70R18 · Size
265/70R18 in inches
265/70R18 is nominally 32.6 in (828 mm) overall diameter by the formula. Section width is 10.4 in (265 mm) and revolutions are 619 per mile.
Fig. 1 — Cross-section
Table 1 — Nominal dimensions
| Item | in | mm |
|---|---|---|
| DOverall diameter | 32.61 | 828 |
| ASection width | 10.43 | 265 |
| BSidewall | 7.30 | 185.5 |
| CRim | 18 | 457.2 |
| Circumference | 102.4 | 2,602 |
| Revs per mile · km | 619 | 384 |
| Flotation size printed | 33X10.50R18LT | Mickey Thompson |
|---|---|---|
| Measuring rim | 8″ | Kumho LT |
| Approved rims | 7.0–9.0″ | 12 LT tires |
Table 2 — Measured range
32.60–32.90″overall diameter, 22 tires from 5 makers (math: 32.61″)
47–60 lbweight, 12 LT versions
10.0–18.9/32″new tread depth
3,525 lbmax load per tire, 8 of 12 LT versions list it, as published
12 LT · 10 Pversions in the makers’ tables we read
All 22 tires ↓Table 3
22 tires in 265/70R18, 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 32.61″. 22 tires from 5 makers measure 32.60″–32.90″. Tallest here: Mickey Thompson Baja Legend EXP (all-terrain), 32.90″. Check the maker’s number before you buy for a tight fit.
| Tire | Type | Diameter | Width | Rims, in | Weight | Tread | Max load |
|---|---|---|---|---|---|---|---|
| Firestone Destination X/Tfirestonetire.com · Oct 15, 2026 | LT · E 124S | 32.60″ | — | 7.0–9.0 | 47.4 lb | 15.0/32″ | — |
| Firestone Transforce HT3firestonetire.com · Oct 15, 2026 | LT · E 124R | 32.60″ | — | 7.0–9.0 | 46.8 lb | 15.0/32″ | — |
| Firestone Transforce AT2firestonetire.com · Oct 15, 2026 | LT · E 124R | 32.60″ | — | 7.0–9.0 | 49.5 lb | 17.0/32″ | — |
| Firestone Winterforce LTfirestonetire.com · Oct 15, 2026 | LT · E 124R | 32.60″ | — | 7.0–9.0 | 50.2 lb | 18.0/32″ | — |
| Kumho Road Venture AT52kumhotireusa.com · Oct 15, 2026 | LT · E 124/121S | 32.60″ | 10.70″ | 7.0–9.0 | 53.9 lb | 16.0/32″ | 3,525 lb @ 80 psi |
| Kumho Crugen HT51kumhotireusa.com · Oct 15, 2026 | LT · E 124/121R | 32.60″ | 10.70″ | 7.0–9.0 | 53.0 lb | 14.5/32″ | 3,525 lb @ 80 psi |
| Toyo Open Country A/T IIItoyotires.com · Oct 15, 2026 | LT · E 124/121Q | 32.60″ | 10.70″ | 7.0–9.0 | 51.0 lb | 16.3/32″ | 3,525 lb @ 80 psi |
| Toyo Open Country R/T Trailtoyotires.com · Oct 15, 2026 | LT · E 124/121Q | 32.60″ | 10.70″ | 7.0–9.0 | 52.0 lb | 16.3/32″ | 3,525 lb @ 80 psi |
| Nitto Terra Grappler G3nittotire.com · Oct 15, 2026 | LT · E 124/121S | 32.64″ | 10.71″ | 7.0–9.0 | 50.8 lb | 15.7/32″ | 3,525 lb @ 80 psi |
| Nitto Ridge Grapplernittotire.com · Oct 15, 2026 | LT · E 124/121Q | 32.87″ | 10.71″ | 7.0–9.0 | 55.4 lb | 16.4/32″ | 3,525 lb @ 80 psi |
| Mickey Thompson Baja Legend EXPmickeythompsontires.com · Oct 15, 2026 | LT · E 124Q | 32.90″ | 10.70″ | 7.0–9.0 | 54.0 lb | 18.5/32″ | 3,525 lb @ 80 psi |
| Toyo Open Country M/Ttoyotires.com · Oct 15, 2026 | LT · E 124/121Q | 32.90″ | 10.70″ | 7.0–9.0 | 60.0 lb | 18.9/32″ | 3,525 lb @ 80 psi |
| Firestone Destination A/T2firestonetire.com · Oct 15, 2026 | SL 114S | 32.60″ | — | 7.0–9.0 | 40.5 lb | 12.0/32″ | — |
| Firestone Destination LE3firestonetire.com · Oct 15, 2026 | SL 116T | 32.60″ | — | 7.0–9.0 | 37.0 lb | 10.0/32″ | — |
| Firestone Destination LE4firestonetire.com · Oct 15, 2026 | SL 116T | 32.60″ | — | 7.0–9.0 | 40.2 lb | 12.0/32″ | — |
| Kumho Road Venture AT52kumhotireusa.com · Oct 15, 2026 | SL 116T | 32.60″ | 10.70″ | 7.0–9.0 | 40.5 lb | 13.5/32″ | 2,756 lb @ 51 psi |
| Kumho Crugen HT51kumhotireusa.com · Oct 15, 2026 | SL 114T | 32.60″ | 9.80″ | 6.5–8.0 | 39.1 lb | 12.5/32″ | 2,601 lb @ 51 psi |
| Toyo Open Country A/T IIItoyotires.com · Oct 15, 2026 | SL 116T | 32.60″ | 10.70″ | 7.0–9.0 | 43.0 lb | 13.3/32″ | 2,756 lb @ 44 psi |
| Toyo Open Country R/T Trailtoyotires.com · Oct 15, 2026 | XL 116T | 32.60″ | 10.70″ | 7.0–9.0 | 46.0 lb | 13.4/32″ | 2,756 lb @ 50 psi |
| Toyo Open Country H/T IItoyotires.com · Oct 15, 2026 | SL 116T | 32.60″ | 10.70″ | 7.0–9.0 | 43.0 lb | 12.1/32″ | 2,756 lb @ 44 psi |
| Nitto Ridge Grapplernittotire.com · Oct 15, 2026 | SL 116T | 32.64″ | 10.71″ | 7.0–9.0 | 45.3 lb | 13.5/32″ | 2,756 lb @ 44 psi |
| Nitto Terra Grappler G3nittotire.com · Oct 15, 2026 | SL 116T | 32.64″ | 10.71″ | 7.0–9.0 | 46.1 lb | 13.4/32″ | 2,756 lb @ 44 psi |
§ 1
Nominal measurements
By the formula 265/70R18 measures 32.6 in (828 mm) overall diameter. Section width is 10.4 in (265 mm). Sidewall height is 7.3 in (186 mm) and rim diameter 18 in (457 mm).
Circumference is 102.4 in (2,602 mm). Revolutions per mile are 619 (384 per km). These are unloaded nominal numbers calculated from the size formula.
§ 2
What makers publish
Makers list 22 tires in 265/70R18 from 5 brands: Firestone, Kumho, Toyo, Nitto and Mickey Thompson. The list includes 12 LT and 10 P-metric or passenger versions with load ranges shown as SL, XL and E.
Published overall diameters run 32.6 in to 32.9 in against 32.61 in by the formula (0.0% to +0.9%). Weights run from 37 lbs to 60 lbs. New tread depths run from 10/32 in to 18.9/32 in.
- Firestone Destination X/T LT265/70R18: overall diameter 32.6 in; weight 47.4 lbs; tread depth 15/32 in.
- Toyo Open Country A/T III LT265/70R18: overall diameter 32.6 in; weight 51 lbs; tread depth 16.3/32 in; maker lists 636 revs per mile.
- Mickey Thompson Baja Legend EXP LT265/70R18: overall diameter 32.9 in; weight 54 lbs; tread depth 18.5/32 in; equivalent listed as 33X10.50R18LT.
§ 3
Closest sizes
The neighbor table uses a ±3% overall-diameter window on nearby rims. The ±3% window is a tire-shop rule of thumb, not a law.
Examples: 305/65R17 measures the same diameter (0.0%). At an indicated 60 mph the true speed is 60.0 mph and revolutions change 619 → 618. 285/70R17 is +0.3% (+0.10 in); at an indicated 60 mph the true speed is 60.2 mph and revolutions change 619 → 617.
- See the neighbor table and the comparison tool for more sizes.
- Use the speedometer calculator to estimate indicated versus true speed for a specific pair of sizes.
Fig. 2
265/70R18 and the sizes next to it
To scale, on one ground line. Diameter by the formula.
Table 4
Compare 265/70R18 with another size
Type any size: diameter, sidewall, speedometer and clearance change against this one.
Comparison
275/70R18 is 33.16″ tall, +1.69% against 265/70R18. At 60 mph on the dial you drive 61.0 mph.
| Item | 265/70R18 | 275/70R18 | Change |
|---|---|---|---|
| Overall diameter | 32.61″ | 33.16″ | +0.55″ +1.69% |
| Section width | 10.43″ | 10.83″ | +0.39″ |
| Sidewall | 7.30″ | 7.58″ | +0.28″ |
| Circumference | 102.4″ | 104.2″ | +1.7″ |
| Revs per mile | 619 | 608 | −10 |
| Axle height | 16.30″ | 16.58″ | +0.28″ |
When the odometer counts 1,000 miles, you have driven 1,016.9 miles.
Engine RPM at the same road speed: −1.7%. Gear ratio calculator
Speedometer
| Dial shows | True speed | Difference |
|---|---|---|
| 30 mph | 30.5 mph | +0.5 |
| 45 mph | 45.8 mph | +0.8 |
| 60 mph | 61.0 mph | +1.0 |
| 70 mph | 71.2 mph | +1.2 |
| 80 mph | 81.4 mph | +1.4 |
265/70R18275/70R18
Note 1
P-metric or LT in the same size
Kumho Road Venture AT52 is published in both versions.
| Kumho Road Venture AT52 | P · 116T | LT · E · 124/121S |
|---|---|---|
| Overall diameter | 32.60″ | 32.60″ |
| Max load | 2,756 lb @ 51 psi | 3,525 lb @ 80 psi |
| Weight | 40.5 lb | 53.9 lb |
| Tread depth | 13.5/32″ | 16.0/32″ |
| Approved rims | 7.0–9.0″ | 7.0–9.0″ |
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 265/70R18: 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 265/70R18
Same rim or ±1″, diameter within 3%. A shop rule of thumb, not a law.
| Size | Diameter | Width | vs 265/70R18 | At 60 mph | Clearance |
|---|---|---|---|---|---|
| 305/65R17 | 32.61″ | 12.0″ | 0.0% | 60.0 | 0.00″ |
| 285/65R18 | 32.59″ | 11.2″ | −0.1% | 60.0 | −0.01″ |
| 285/70R17 | 32.71″ | 11.2″ | +0.3% | 60.2 | +0.05″ |
| 235/80R18 | 32.80″ | 9.3″ | +0.6% | 60.4 | +0.10″ |
| 305/60R18 | 32.41″ | 12.0″ | −0.6% | 59.6 | −0.10″ |
| 33x11.50R17 | 33.00″ | 11.5″ | +1.2% | 60.7 | +0.20″ |
| 33x11.50R18 | 33.00″ | 11.5″ | +1.2% | 60.7 | +0.20″ |
| 33x12.50R17 | 33.00″ | 12.5″ | +1.2% | 60.7 | +0.20″ |
| 33x12.50R18 | 33.00″ | 12.5″ | +1.2% | 60.7 | +0.20″ |
| 275/70R17 | 32.16″ | 10.8″ | −1.4% | 59.2 | −0.22″ |
Q&A
Common questions
What is the overall diameter of 265/70R18?
By the size formula 265/70R18 is 32.6 in (828 mm) overall diameter. Makers publish diameters from 32.6 in to 32.9 in.
How will a different size affect my speedometer?
Small diameter changes alter true speed. For example, switching to 285/70R17 (+0.3%) makes 60 indicated show 60.2 mph; switching to 305/65R17 (0.0%) leaves it at 60.0 mph. Use the speedometer calculator for other sizes.
What load information is on the tire and vehicle?
The tire sidewall shows the maximum load rating and, for LT tires, the load range letter (49 CFR 571.139). The vehicle’s tire and loading placard is on the driver’s door jamb (49 CFR 571.110).
How many makers and LT vs P versions are available?
Size tables list 22 tires from 5 brands. There are 12 LT and 10 P-metric or passenger versions, with load ranges SL, XL and E.
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
- Kumho: size table (kumhotireusa.com)checked Oct 15, 2026
- Toyo: size table (toyotires.com)checked Oct 15, 2026
- Nitto: size table (nittotire.com)checked Oct 15, 2026
- Mickey Thompson: size table (mickeythompsontires.com)checked Oct 15, 2026
- Firestone: size table (firestonetire.com)checked Oct 15, 2026
- Firestone: size table (firestonetire.com)checked Oct 15, 2026
- Firestone: size table (firestonetire.com)checked Oct 15, 2026
- Kumho: size table (kumhotireusa.com)checked Oct 15, 2026
- Toyo: size table (toyotires.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.