Data sheet TS-275/65R20 · Size
275/65R20 in inches
275/65R20 measures 34.1 in (866 mm) overall by the formula. The page gives nominal numbers, published maker measurements and nearby sizes within ±3%.
Fig. 1 — Cross-section
Table 1 — Nominal dimensions
| Item | in | mm |
|---|---|---|
| DOverall diameter | 34.07 | 866 |
| ASection width | 10.83 | 275 |
| BSidewall | 7.04 | 178.8 |
| CRim | 20 | 508.0 |
| Circumference | 107.0 | 2,719 |
| Revs per mile · km | 592 | 368 |
| Flotation size printed | 34X11.00R20LT | Mickey Thompson |
|---|---|---|
| Measuring rim | 8″ | Nitto LT |
| Approved rims | 8.0–9.5, 7.5–9.5, 7.5–9.0″ | 18 LT tires |
Table 2 — Measured range
34.05–34.70″overall diameter, 22 tires from 5 makers (math: 34.07″)
50–69 lbweight, 18 LT versions
13.5–20.0/32″new tread depth
3,750 lbmax load per tire, 13 of 18 LT versions list it, as published
18 LT · 4 Pversions in the makers’ tables we read
All 22 tires ↓Table 3
22 tires in 275/65R20, 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 34.07″. 22 tires from 5 makers measure 34.05″–34.70″. Tallest here: Mickey Thompson Baja Legend EXP (all-terrain), 34.70″. Check the maker’s number before you buy for a tight fit.
| Tire | Type | Diameter | Width | Rims, in | Weight | Tread | Max load |
|---|---|---|---|---|---|---|---|
| Nitto Dura Grapplernittotire.com · Oct 15, 2026 | LT · E 126/123R | 34.05″ | 10.90″ | 8.0–9.5 | 60.8 lb | 16.0/32″ | 3,750 lb @ 80 psi |
| Firestone Winterforce LTfirestonetire.com · Oct 15, 2026 | LT · E 126R | 34.09″ | — | 7.5–9.5 | 57.3 lb | 18.0/32″ | — |
| Nitto Ridge Grapplernittotire.com · Oct 15, 2026 | LT · E 126/123Q | 34.09″ | 10.98″ | 8.0–9.5 | 60.9 lb | 16.4/32″ | 3,750 lb @ 80 psi |
| Nitto Recon Grappler A/Tnittotire.com · Oct 15, 2026 | LT · E 126/123S | 34.09″ | 10.98″ | 8.0–9.5 | 58.6 lb | 15.9/32″ | 3,750 lb @ 80 psi |
| Firestone Destination X/Tfirestonetire.com · Oct 15, 2026 | LT · E 126S | 34.10″ | — | 7.5–9.5 | 52.6 lb | 16.0/32″ | — |
| Firestone Transforce HT3firestonetire.com · Oct 15, 2026 | LT · E 126S | 34.10″ | — | 7.5–9.5 | 50.3 lb | 15.0/32″ | — |
| Firestone Transforce AT2firestonetire.com · Oct 15, 2026 | LT · E 126R | 34.10″ | — | 7.5–9.5 | 51.2 lb | 16.0/32″ | — |
| Kumho Road Venture AT52kumhotireusa.com · Oct 15, 2026 | LT · E 126/123S | 34.10″ | 11.00″ | 8.0–9.5 | 55.4 lb | 16.0/32″ | 3,750 lb @ 80 psi |
| Kumho Road Venture RTkumhotireusa.com · Oct 15, 2026 | LT · E 126/123R | 34.10″ | 11.00″ | 8.0–9.5 | 62.7 lb | 17.3/32″ | 3,750 lb @ 80 psi |
| Toyo Open Country A/T IIItoyotires.com · Oct 15, 2026 | LT · E 126/123S | 34.10″ | 11.00″ | 8.0–9.5 | 55.0 lb | 16.4/32″ | 3,750 lb @ 80 psi |
| Toyo Open Country R/T Trailtoyotires.com · Oct 15, 2026 | LT · E 126/123S | 34.10″ | 11.00″ | 8.0–9.5 | 57.0 lb | 16.4/32″ | 3,750 lb @ 80 psi |
| Toyo Open Country H/T IItoyotires.com · Oct 15, 2026 | LT · E 126/123S | 34.10″ | 11.00″ | 7.5–9.5 | 57.0 lb | 14.5/32″ | 3,750 lb @ 80 psi |
| Firestone Destination M/T2firestonetire.com · Oct 15, 2026 | LT · E 126Q | 34.30″ | — | 7.5–9.5 | 58.1 lb | 20.0/32″ | — |
| Kumho Road Venture MT71kumhotireusa.com · Oct 15, 2026 | LT · E 126/123Q | 34.30″ | 11.00″ | 7.5–9.0 | 68.5 lb | 19.0/32″ | 3,750 lb @ 80 psi |
| Nitto Trail Grappler M/Tnittotire.com · Oct 15, 2026 | LT · E 126/123Q | 34.33″ | 10.98″ | 8.0–9.5 | 67.9 lb | 19.1/32″ | 3,750 lb @ 80 psi |
| Mickey Thompson Baja Boss A/Tmickeythompsontires.com · Oct 15, 2026 | LT · E 126Q | 34.50″ | 10.80″ | 7.5–9.5 | 65.0 lb | 18.5/32″ | 3,750 lb @ 80 psi |
| Mickey Thompson Baja Legend MTZmickeythompsontires.com · Oct 15, 2026 | LT · E 126Q | 34.50″ | 10.90″ | 7.5–9.5 | 63.0 lb | 19.5/32″ | 3,750 lb @ 80 psi |
| Mickey Thompson Baja Legend EXPmickeythompsontires.com · Oct 15, 2026 | LT · E 126Q | 34.70″ | 11.50″ | 7.5–9.5 | 61.0 lb | 18.5/32″ | 3,750 lb @ 80 psi |
| Nitto Ridge Grapplernittotire.com · Oct 15, 2026 | SL 116T | 34.09″ | 10.98″ | 7.5–9.5 | 51.8 lb | 13.5/32″ | 2,756 lb @ 44 psi |
| Nitto Recon Grappler A/Tnittotire.com · Oct 15, 2026 | SL 116T | 34.09″ | 10.98″ | 7.5–9.5 | 47.5 lb | 13.5/32″ | 2,756 lb @ 44 psi |
| Nitto Terra Grappler G3nittotire.com · Oct 15, 2026 | SL 116T | 34.09″ | 10.98″ | 7.5–9.5 | 47.0 lb | 13.5/32″ | 2,756 lb @ 44 psi |
| Toyo Open Country R/T Trailtoyotires.com · Oct 15, 2026 | SL 116T | 34.10″ | 11.00″ | 7.5–9.5 | 48.0 lb | 13.5/32″ | 2,756 lb @ 44 psi |
§ 1
Nominal numbers by the formula
Overall diameter 34.1 in (866 mm) by the formula. Section width 10.8 in (275 mm). Sidewall height 7.0 in (179 mm). Rim 20 in (508 mm).
Circumference 107.0 in (2,719 mm). 592 revolutions per mile (368 per km). These are nominal unloaded numbers calculated from the standard size math.
- Sidewall = section width × aspect ratio / 100.
- Overall diameter = rim × 25.4 mm + 2 × sidewall.
- Revolutions per mile = 63,360 / (π × diameter in inches).
§ 2
What makers publish
Makers' size tables list 22 tires in 275/65R20 from five brands. Tables show 18 LT versions and 4 P-metric or passenger versions. Load ranges include SL and E. Published overall diameters run from 34.05 in to 34.7 in versus 34.1 in by the formula (about −0.1% to +1.8%).
Weights in maker tables range from 47 lbs to 68.5 lbs. New tread depths range from 13.5/32 in to 20/32 in. Examples: Nitto lists the Dura Grappler LT275/65R20 at 34.05 in, 60.8 lbs and 16/32 in tread depth. Toyo lists the Open Country A/T III at 34.1 in, 55 lbs and 16.4/32 in tread depth. Mickey Thompson lists the Baja Boss A/T at 34.5 in, 65 lbs and 18.5/32 in tread depth.
- Published diameters: 34.05 in to 34.7 in (maker tables).
- Weights: 47 lbs to 68.5 lbs (maker tables).
- New tread depths: 13.5/32 in to 20/32 in (maker tables).
§ 3
Closest sizes and effects
Nearby sizes within a ±3% overall-diameter window include 34x11.50R20 (34.0 in), 295/60R20 (33.9 in) and 285/65R20 (34.6 in). The ±3% window is a tire-shop rule of thumb, not a law. See the comparison tool for more neighbors and exact numbers.
Speedometer and axle clearance effects are small for these neighbors. For 295/60R20 the true speed at an indicated 60 mph is 59.8 mph and axle clearance changes by −0.07 in (−2 mm). For 285/65R20 the true speed at an indicated 60 mph is 60.9 mph and axle clearance changes by +0.26 in (+7 mm). Use the 275/65R20 vs 285/65R20 comparison or the comparison tool for full figures.
- 295/60R20: diameter −0.4%, indicated 60 mph → true 59.8 mph, revs 592 → 594.
- 285/65R20: diameter +1.5%, indicated 60 mph → true 60.9 mph, revs 592 → 583.
Fig. 2
275/65R20 and the sizes next to it
To scale, on one ground line. Diameter by the formula.
Table 4
Compare 275/65R20 with another size
Type any size: diameter, sidewall, speedometer and clearance change against this one.
Comparison
275/60R20 is 32.99″ tall, −3.18% against 275/65R20. At 60 mph on the dial you drive 58.1 mph.
| Item | 275/65R20 | 275/60R20 | Change |
|---|---|---|---|
| Overall diameter | 34.07″ | 32.99″ | −1.08″ −3.18% |
| Section width | 10.83″ | 10.83″ | 0.00″ |
| Sidewall | 7.04″ | 6.50″ | −0.54″ |
| Circumference | 107.0″ | 103.6″ | −3.4″ |
| Revs per mile | 592 | 611 | +19 |
| Axle height | 17.04″ | 16.50″ | −0.54″ |
When the odometer counts 1,000 miles, you have driven 968.2 miles.
Engine RPM at the same road speed: +3.3%. Gear ratio calculator
Speedometer
| Dial shows | True speed | Difference |
|---|---|---|
| 30 mph | 29.0 mph | −1.0 |
| 45 mph | 43.6 mph | −1.4 |
| 60 mph | 58.1 mph | −1.9 |
| 70 mph | 67.8 mph | −2.2 |
| 80 mph | 77.5 mph | −2.5 |
275/65R20275/60R20
Note 1
P-metric or LT in the same size
Nitto Ridge Grappler is published in both versions.
| Nitto Ridge Grappler | P · 116T | LT · E · 126/123Q |
|---|---|---|
| Overall diameter | 34.09″ | 34.09″ |
| Max load | 2,756 lb @ 44 psi | 3,750 lb @ 80 psi |
| Weight | 51.8 lb | 60.9 lb |
| Tread depth | 13.5/32″ | 16.4/32″ |
| Approved rims | 7.5–9.5″ | 8.0–9.5″ |
Source: Nitto 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 275/65R20: 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 275/65R20
Same rim or ±1″, diameter within 3%. A shop rule of thumb, not a law.
| Size | Diameter | Width | vs 275/65R20 | At 60 mph | Clearance |
|---|---|---|---|---|---|
| 34x11.50R20 | 34.00″ | 11.5″ | −0.2% | 59.9 | −0.04″ |
| 295/60R20 | 33.94″ | 11.6″ | −0.4% | 59.8 | −0.07″ |
| 285/65R20 | 34.59″ | 11.2″ | +1.5% | 60.9 | +0.26″ |
| 285/60R20 | 33.46″ | 11.2″ | −1.8% | 58.9 | −0.31″ |
| 315/60R20 | 34.88″ | 12.4″ | +2.4% | 61.4 | +0.40″ |
| 305/55R20 | 33.21″ | 12.0″ | −2.5% | 58.5 | −0.43″ |
| 35x11.50R20 | 35.00″ | 11.5″ | +2.7% | 61.6 | +0.46″ |
| 35x12.50R20 | 35.00″ | 12.5″ | +2.7% | 61.6 | +0.46″ |
| 35x13.50R20 | 35.00″ | 13.5″ | +2.7% | 61.6 | +0.46″ |
| 35x15.50R20 | 35.00″ | 15.5″ | +2.7% | 61.6 | +0.46″ |
Q&A
Common questions
How many revolutions per mile does 275/65R20 make?
By the formula 275/65R20 makes 592 revolutions per mile (368 per km).
Are LT versions common in 275/65R20?
Yes. Maker tables show 18 LT tires and 4 P-metric or passenger versions in 275/65R20 across five brands.
Where do I read load and inflation information?
The tire sidewall shows the maximum load rating and, for LT tires, the load range letter as required by 49 CFR 571.139 (FMVSS No. 139). The tire and loading placard on the driver's door jamb lists the vehicle maker's recommended cold inflation pressure (49 CFR 571.110).
How much do published diameters differ from the nominal size?
Published overall diameters in maker tables run from 34.05 in to 34.7 in, about −0.1% to +1.8% versus the nominal diameter. Individual models publish their own measurements.
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.
- Nitto: size table (nittotire.com)checked Oct 15, 2026
- Kumho: size table (kumhotireusa.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.