Data sheet TS-245/75R17 · Size
245/75R17 in inches
245/75R17 measures 31.5 in (799 mm) overall diameter by the formula. It makes 641 revolutions per mile (398 per km).
Fig. 1 — Cross-section
Table 1 — Nominal dimensions
| Item | in | mm |
|---|---|---|
| DOverall diameter | 31.47 | 799 |
| ASection width | 9.65 | 245 |
| BSidewall | 7.23 | 183.8 |
| CRim | 17 | 431.8 |
| Circumference | 98.9 | 2,511 |
| Revs per mile · km | 641 | 398 |
| Measuring rim | 7″ | Kumho LT |
|---|---|---|
| Approved rims | 6.5–7.5, 6.5–8.0, 6.5–8.5″ | 11 LT tires |
Table 2 — Measured range
31.50″overall diameter, 13 tires from 4 makers (math: 31.47″)
42–50 lbweight, 11 LT versions
12.0–19.0/32″new tread depth
3,195 lbmax load per tire, 6 of 11 LT versions list it, as published
11 LT · 2 Pversions in the makers’ tables we read
All 13 tires ↓Table 3
13 tires in 245/75R17, 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 31.47″. 13 tires from 4 makers measure 31.50″–31.50″. 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 121S | 31.50″ | — | 6.5–7.5 | 42.2 lb | 14.0/32″ | — |
| Firestone Destination M/T2firestonetire.com · Oct 15, 2026 | LT · E 121Q | 31.50″ | — | 6.5–7.5 | 49.9 lb | 19.0/32″ | — |
| Firestone Transforce HT3firestonetire.com · Oct 15, 2026 | LT · E 121R | 31.50″ | — | 6.5–7.5 | 48.3 lb | 14.0/32″ | — |
| Firestone Transforce AT2firestonetire.com · Oct 15, 2026 | LT · E 121R | 31.50″ | — | 6.5–7.5 | 43.1 lb | 17.0/32″ | — |
| Firestone Winterforce LTfirestonetire.com · Oct 15, 2026 | LT · E 121R | 31.50″ | — | 6.5–7.5 | 44.4 lb | 17.0/32″ | — |
| Kumho Road Venture AT52kumhotireusa.com · Oct 15, 2026 | LT · E 121/118S | 31.50″ | 9.80″ | 6.5–8.0 | 46.4 lb | 16.0/32″ | 3,195 lb @ 80 psi |
| Kumho Crugen HT51kumhotireusa.com · Oct 15, 2026 | LT · E 121/118S | 31.50″ | 10.20″ | 6.5–8.5 | 46.3 lb | 14.5/32″ | 3,195 lb @ 80 psi |
| Nitto Terra Grappler G3nittotire.com · Oct 15, 2026 | LT · E 121/118S | 31.50″ | 9.76″ | 6.5–8.0 | 44.6 lb | 15.5/32″ | 3,195 lb @ 80 psi |
| Nitto Dura Grapplernittotire.com · Oct 15, 2026 | LT · E 121/118Q | 31.50″ | 9.76″ | 6.5–8.0 | 48.5 lb | 16.4/32″ | 3,195 lb @ 80 psi |
| Toyo Open Country A/T IIItoyotires.com · Oct 15, 2026 | LT · E 121/118S | 31.50″ | 9.80″ | 6.5–8.0 | 44.0 lb | 16.1/32″ | 3,195 lb @ 80 psi |
| Toyo Open Country H/T IItoyotires.com · Oct 15, 2026 | LT · E 121/118S | 31.50″ | 9.80″ | 6.5–7.5 | 44.0 lb | 14.4/32″ | 3,195 lb @ 80 psi |
| Firestone Destination A/T2firestonetire.com · Oct 15, 2026 | SL 112S | 31.50″ | — | 6.5–8.0 | 35.0 lb | 12.0/32″ | — |
| Nitto Terra Grappler G3nittotire.com · Oct 15, 2026 | XL 116T | 31.50″ | 9.76″ | 6.5–8.0 | 39.6 lb | 13.1/32″ | 2,756 lb @ 50 psi |
§ 1
What the numbers mean
245/75R17 is nominal by the formula. Section width = 9.6 in (245 mm). Sidewall height = 7.2 in (184 mm). Rim = 17 in (432 mm).
Overall diameter by the formula is 31.5 in (799 mm). Circumference is 98.9 in (2,511 mm). Revolutions per mile are 641 (398 per km). These are unloaded, nominal numbers; real tires measure slightly differently (method checked October 15, 2026).
§ 2
What makers publish
Tire makers’ size tables list 13 tires in 245/75R17 from 4 brands. These include 11 LT versions and 2 P-metric versions. Makers list load ranges SL, XL and E. Published overall diameters run 31.5 in to 31.5 in, against 31.47 in by the formula (+0.1% to +0.1%).
Manufacturers also publish weights, tread depths and approved rim widths as required by regulation. See the tire and loading placard on the driver’s door jamb for vehicle information and the maker’s rim listing per 49 CFR 571.139.
- Firestone Destination X/T LT245/75R17: diameter 31.5 in; weight 42.2 lbs; tread depth 14/32 in; load range E. (Firestone)
- Kumho Road Venture AT52 LT245/75R17: diameter 31.5 in; section width (measuring rim) 9.8 in; weight 46.4 lbs; tread depth 16/32 in; max load 3,195 lbs at 80 psi. (Kumho)
- Toyo Open Country A/T III LT245/75R17: diameter 31.5 in; overall width 9.8 in; weight 44 lbs; tread depth 16.1/32 in; Toyo lists 660 revs per mile. (Toyo)
§ 3
Close sizes and changes
The neighbor table uses a ±3% overall-diameter window. That ±3% window is a tire-shop rule of thumb, not a law.
Examples from the neighbor set: 285/60R18 is essentially the same diameter (31.5 in, 0.0%). At an indicated 60 mph the true speed is 60.0 mph and revolutions per mile stay 641 → 641. 265/70R17 is slightly larger (+0.4%, +0.14 in); at an indicated 60 mph the true speed is 60.3 mph and revolutions change 641 → 638. Use the speedometer calculator or the comparison tool for other sizes.
- Nearby sizes within ±3% include 285/60R18, 265/65R18 and 265/70R17.
- A 0.4% diameter increase shifts indicated 60 mph to about 60.3 mph and reduces revs per mile from 641 to 638.
Fig. 2
245/75R17 and the sizes next to it
To scale, on one ground line. Diameter by the formula.
Table 4
Compare 245/75R17 with another size
Type any size: diameter, sidewall, speedometer and clearance change against this one.
Comparison
265/70R17 is 31.61″ tall, +0.44% against 245/75R17. At 60 mph on the dial you drive 60.3 mph.
| Item | 245/75R17 | 265/70R17 | Change |
|---|---|---|---|
| Overall diameter | 31.47″ | 31.61″ | +0.14″ +0.44% |
| Section width | 9.65″ | 10.43″ | +0.79″ |
| Sidewall | 7.23″ | 7.30″ | +0.07″ |
| Circumference | 98.9″ | 99.3″ | +0.4″ |
| Revs per mile | 641 | 638 | −3 |
| Axle height | 15.73″ | 15.80″ | +0.07″ |
When the odometer counts 1,000 miles, you have driven 1,004.4 miles.
Engine RPM at the same road speed: −0.4%. Gear ratio calculator
Speedometer
| Dial shows | True speed | Difference |
|---|---|---|
| 30 mph | 30.1 mph | +0.1 |
| 45 mph | 45.2 mph | +0.2 |
| 60 mph | 60.3 mph | +0.3 |
| 70 mph | 70.3 mph | +0.3 |
| 80 mph | 80.4 mph | +0.4 |
245/75R17265/70R17
Note 1
P-metric or LT in the same size
Nitto Terra Grappler G3 is published in both versions.
| Nitto Terra Grappler G3 | P · 116T | LT · E · 121/118S |
|---|---|---|
| Overall diameter | 31.50″ | 31.50″ |
| Max load | 2,756 lb @ 50 psi | 3,195 lb @ 80 psi |
| Weight | 39.6 lb | 44.6 lb |
| Tread depth | 13.1/32″ | 15.5/32″ |
| Approved rims | 6.5–8.0″ | 6.5–8.0″ |
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 245/75R17: 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 245/75R17
Same rim or ±1″, diameter within 3%. A shop rule of thumb, not a law.
| Size | Diameter | Width | vs 245/75R17 | At 60 mph | Clearance |
|---|---|---|---|---|---|
| 285/60R18 | 31.46″ | 11.2″ | 0.0% | 60.0 | 0.00″ |
| 265/65R18 | 31.56″ | 10.4″ | +0.3% | 60.2 | +0.05″ |
| 265/70R17 | 31.61″ | 10.4″ | +0.4% | 60.3 | +0.07″ |
| 265/75R16 | 31.65″ | 10.4″ | +0.6% | 60.3 | +0.09″ |
| 285/70R16 | 31.71″ | 11.2″ | +0.8% | 60.5 | +0.12″ |
| 235/85R16 | 31.73″ | 9.3″ | +0.8% | 60.5 | +0.13″ |
| 275/70R16 | 31.16″ | 10.8″ | −1.0% | 59.4 | −0.16″ |
| 235/80R17 | 31.80″ | 9.3″ | +1.1% | 60.6 | +0.17″ |
| 255/70R17 | 31.06″ | 10.0″ | −1.3% | 59.2 | −0.21″ |
| 255/65R18 | 31.05″ | 10.0″ | −1.3% | 59.2 | −0.21″ |
Q&A
Common questions
What is the nominal diameter of 245/75R17?
By the size formula the nominal overall diameter is 31.5 in (799 mm). Revolutions per mile are 641 (398 per km).
How wide is a 245/75R17?
Nominal section width by the formula is 9.6 in (245 mm). Makers’ measured widths appear around 9.76–10.2 in on their measuring rims. (Tire makers’ size tables)
Will a neighboring size change my speedometer?
Small changes occur. For example, 265/70R17 is +0.4% in diameter; an indicated 60 mph becomes about 60.3 mph. Use the speedometer calculator for exact values.
What tire information should I keep from the door placard?
Keep the vehicle maker’s placard for the recommended cold inflation pressures and vehicle loading information. The placard is on the driver’s side B-pillar. (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
- Kumho: size table (kumhotireusa.com)checked Oct 15, 2026
- Nitto: size table (nittotire.com)checked Oct 15, 2026
- Toyo: size table (toyotires.com)checked Oct 15, 2026
- Kumho: size table (kumhotireusa.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.