Data sheet TS-235/85R16 · Size
235/85R16 in inches
235/85R16 measures 31.7 in (806 mm) overall by the formula and turns 636 revolutions per mile (395 per km).
Fig. 1 — Cross-section
Table 1 — Nominal dimensions
| Item | in | mm |
|---|---|---|
| DOverall diameter | 31.73 | 806 |
| ASection width | 9.25 | 235 |
| BSidewall | 7.86 | 199.8 |
| CRim | 16 | 406.4 |
| Circumference | 99.7 | 2,532 |
| Revs per mile · km | 636 | 395 |
| Measuring rim | 6.5″ | Nitto LT |
|---|---|---|
| Approved rims | 6.0–7.5, 6.5–8.0″ | 11 LT tires |
Table 2 — Measured range
31.69–32.00″overall diameter, 11 tires from 4 makers (math: 31.73″)
40–55 lbweight, 11 LT versions
14.0–19.0/32″new tread depth
3,042 lbmax load per tire, 7 of 11 LT versions list it, as published
11 LT · 0 Pversions in the makers’ tables we read
All 11 tires ↓Table 3
11 tires in 235/85R16, 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 31.73″. 11 tires from 4 makers measure 31.69″–32.00″. Tallest here: Kumho Road Venture MT71 (mud-terrain), 32.00″. 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 120R | 31.69″ | 9.57″ | 6.0–7.5 | 45.4 lb | 15.6/32″ | 3,042 lb @ 80 psi |
| Firestone Destination X/Tfirestonetire.com · Oct 15, 2026 | LT · E 120S | 31.70″ | — | 6.0–7.5 | 40.0 lb | 14.0/32″ | — |
| Firestone Destination M/T2firestonetire.com · Oct 15, 2026 | LT · E 120Q | 31.70″ | — | 6.0–7.5 | 49.0 lb | 19.0/32″ | — |
| Firestone Transforce HT3firestonetire.com · Oct 15, 2026 | LT · E 120R | 31.70″ | — | 6.0–7.5 | 47.7 lb | 14.0/32″ | — |
| Firestone Transforce AT2firestonetire.com · Oct 15, 2026 | LT · E 120R | 31.70″ | — | 6.0–7.5 | 41.3 lb | 17.0/32″ | — |
| Kumho Road Venture AT52kumhotireusa.com · Oct 15, 2026 | LT · E 120/116S | 31.70″ | 9.30″ | 6.0–7.5 | 46.7 lb | 16.0/32″ | 3,042 lb @ 80 psi |
| Kumho Crugen HT51kumhotireusa.com · Oct 15, 2026 | LT · E 120/116R | 31.70″ | 9.80″ | 6.5–8.0 | 44.9 lb | 14.5/32″ | 3,042 lb @ 80 psi |
| Toyo Open Country A/T IIItoyotires.com · Oct 15, 2026 | LT · E 120/116R | 31.70″ | 9.30″ | 6.0–7.5 | 44.0 lb | 16.0/32″ | 3,042 lb @ 80 psi |
| Toyo Open Country H/T IItoyotires.com · Oct 15, 2026 | LT · E 120/116S | 31.70″ | 9.30″ | 6.0–7.5 | 44.0 lb | 14.5/32″ | 3,042 lb @ 80 psi |
| Kumho Road Venture MT71kumhotireusa.com · Oct 15, 2026 | LT · E 120/116Q | 32.00″ | 9.30″ | 6.0–7.5 | 55.0 lb | 18.0/32″ | 3,042 lb @ 80 psi |
| Toyo Open Country M/Ttoyotires.com · Oct 15, 2026 | LT · E 120/116P | 32.00″ | 9.40″ | 6.0–7.5 | 54.0 lb | 18.4/32″ | 3,042 lb @ 80 psi |
§ 1
Nominal dimensions
By the formula 235/85R16 has a section width of 9.3 in (235 mm), a sidewall height of 7.9 in (200 mm) and a 16 in (406 mm) rim; nominal overall diameter is 31.7 in (806 mm), circumference 99.7 in (2,532 mm) and revs/mi 636 (395 per km).
§ 2
Published measurements
Makers' size tables list 11 tires in 235/85R16 from four brands; all 11 are LT versions and makers list load range E. Published overall diameters run 31.69 in to 32.00 in against 31.73 in by the formula.
Published weights run 40 lbs to 55 lbs and new tread depths run 14/32 in to 19/32 in.
- Nitto Dura Grappler LT235/85R16: overall diameter 31.69 in; weight 45.4 lbs; tread depth 15.6/32 in. (Nitto)
- Kumho Road Venture MT71 LT235/85R16: overall diameter 32.00 in; weight 55 lbs; tread depth 18/32 in. (Kumho)
- Toyo Open Country A/T III LT235/85R16: overall diameter 31.7 in; Toyo lists 655 revs per mile; weight 44 lbs; tread depth 16/32 in. (Toyo)
§ 3
Closest sizes and changes
Sizes within ±3% of 235/85R16 include 285/70R16 (31.7 in, −0.1%), 235/80R17 (31.8 in, +0.2%) and 265/75R16 (31.6 in, −0.2%). The ±3% window is a tire-shop rule of thumb, not a law.
Examples of what changes: 285/70R16 produces essentially no speedometer change at an indicated 60 mph (true speed 60.0 mph) and revs/mi remain 636. Switching to 235/80R17 gives a small increase in true speed at an indicated 60 mph (60.1 mph) and reduces revs/mi to 634. See the speedometer calculator for other comparisons.
- 285/70R16: diameter −0.1% (−0.02 in, −1 mm); revs/mi 636 → 636; true speed at 60 indicated = 60.0 mph (99.9 km/h).
- 235/80R17: diameter +0.2% (+0.07 in, +2 mm); revs/mi 636 → 634; true speed at 60 indicated = 60.1 mph (100.2 km/h).
- 265/75R16: diameter −0.2% (−0.08 in, −2 mm); revs/mi 636 → 637; true speed at 60 indicated = 59.9 mph (99.8 km/h).
Fig. 2
235/85R16 and the sizes next to it
To scale, on one ground line. Diameter by the formula.
Table 4
Compare 235/85R16 with another size
Type any size: diameter, sidewall, speedometer and clearance change against this one.
Comparison
245/85R16 is 32.40″ tall, +2.11% against 235/85R16. At 60 mph on the dial you drive 61.3 mph.
| Item | 235/85R16 | 245/85R16 | Change |
|---|---|---|---|
| Overall diameter | 31.73″ | 32.40″ | +0.67″ +2.11% |
| Section width | 9.25″ | 9.65″ | +0.39″ |
| Sidewall | 7.86″ | 8.20″ | +0.33″ |
| Circumference | 99.7″ | 101.8″ | +2.1″ |
| Revs per mile | 636 | 623 | −13 |
| Axle height | 15.86″ | 16.20″ | +0.33″ |
When the odometer counts 1,000 miles, you have driven 1,021.1 miles.
Engine RPM at the same road speed: −2.1%. Gear ratio calculator
Speedometer
| Dial shows | True speed | Difference |
|---|---|---|
| 30 mph | 30.6 mph | +0.6 |
| 45 mph | 45.9 mph | +0.9 |
| 60 mph | 61.3 mph | +1.3 |
| 70 mph | 71.5 mph | +1.5 |
| 80 mph | 81.7 mph | +1.7 |
235/85R16245/85R16
Note 1
P-metric or LT in the same size
11 LT and 0 P versions in the tables we read.
No single model in our tables is published in both P and LT versions of 235/85R16; Table 3 lists both types side by side.
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 235/85R16: 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 235/85R16
Same rim or ±1″, diameter within 3%. A shop rule of thumb, not a law.
| Size | Diameter | Width | vs 235/85R16 | At 60 mph | Clearance |
|---|---|---|---|---|---|
| 285/70R16 | 31.71″ | 11.2″ | −0.1% | 60.0 | −0.01″ |
| 235/80R17 | 31.80″ | 9.3″ | +0.2% | 60.1 | +0.04″ |
| 265/75R16 | 31.65″ | 10.4″ | −0.2% | 59.9 | −0.04″ |
| 265/70R17 | 31.61″ | 10.4″ | −0.4% | 59.8 | −0.06″ |
| 245/75R17 | 31.47″ | 9.6″ | −0.8% | 59.5 | −0.13″ |
| 255/75R17 | 32.06″ | 10.0″ | +1.0% | 60.6 | +0.17″ |
| 275/70R17 | 32.16″ | 10.8″ | +1.4% | 60.8 | +0.21″ |
| 275/70R16 | 31.16″ | 10.8″ | −1.8% | 58.9 | −0.29″ |
| 255/70R17 | 31.06″ | 10.0″ | −2.1% | 58.7 | −0.34″ |
| 31x10.50R15 | 31.00″ | 10.5″ | −2.3% | 58.6 | −0.36″ |
Q&A
Common questions
What is the overall diameter of 235/85R16?
By the formula the nominal overall diameter is 31.7 in (806 mm). Published measurements run about 31.69 in to 32.00 in.
How many revolutions per mile does 235/85R16 make?
Nominally 235/85R16 turns 636 revolutions per mile (395 per km). Some makers list different revs/mi; for example Toyo lists 655 revs per mile for certain models.
Are 235/85R16 tires LT or passenger (P)?
Makers' size tables list 11 tires in 235/85R16 and all 11 are LT versions. Load range E is the listed load range.
What should I check on my vehicle before changing sizes?
See the tire and loading placard on the driver's door jamb for the vehicle maker's recommended cold inflation pressures and loading. The tire sidewall shows the maximum load rating and, for LT tires, the load range letter (49 CFR 571.110; 49 CFR 571.139).
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
- 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
- Firestone: size table (firestonetire.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.