Sheet TS-285/70R17Rev. Oct 15, 2026United States · Canada

Data sheet TS-285/70R17 · Size

285/70R17 in inches

285/70R17 measures 32.7 in (831 mm) overall by the formula. Section width is 11.2 in (285 mm) and the tire makes 617 revolutions per mile.

Fig. 1 — Cross-section

D32.7″B7.9″C17″A11.2″
A section width, B sidewall, C rim, D overall diameter. Nominal, on the measuring rim.

Table 1 — Nominal dimensions

285/70R17: nominal dimensions in inches and millimeters
Iteminmm
Overall diameter32.71831
Section width11.22285
Sidewall7.85199.5
Rim17431.8
Circumference102.82,610
Revs per mile · km617383
From the makers’ size tables
Flotation size printed33X11.50R17LTMickey Thompson
Measuring rim8.5″Nitto LT
Approved rims7.5–9.5, 7.5–9.0″21 LT tires

Table 2 — Measured range

32.76–33.15″overall diameter, 28 tires from 5 makers (math: 32.71″)

50–67 lbweight, 21 LT versions

12.0–20.0/32″new tread depth

3,195–3,750 lbmax load per tire, 17 of 21 LT versions list it, as published

21 LT · 7 Pversions in the makers’ tables we read

All 28 tires ↓

Table 3

28 tires in 285/70R17, 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 32.71″. 28 tires from 5 makers measure 32.76″–33.15″. Tallest here: Nitto Trail Grappler M/T (mud-terrain), 33.15″. Check the maker’s number before you buy for a tight fit.

Published dimensions for 285/70R17
TireTypeDiameterWidthRims, inWeightTreadMax load
Nitto Ridge Grapplernittotire.com · Oct 15, 2026LT · E 121/118Q32.76″11.50″7.5–9.557.9 lb16.4/32″3,195 lb @ 80 psi
Nitto Recon Grappler A/Tnittotire.com · Oct 15, 2026LT · E 126/123S32.76″11.50″7.5–9.554.6 lb16.0/32″3,750 lb @ 80 psi
Nitto Terra Grappler G3nittotire.com · Oct 15, 2026LT · E 126/123S32.76″11.50″7.5–9.556.2 lb16.0/32″3,750 lb @ 80 psi
Nitto Dura Grapplernittotire.com · Oct 15, 2026LT · E 126/123R32.79″11.49″7.5–9.555.3 lb16.9/32″3,750 lb @ 80 psi
Firestone Destination X/Tfirestonetire.com · Oct 15, 2026LT · E 121S32.80″—7.5–9.050.2 lb16.0/32″—
Firestone Destination M/T2firestonetire.com · Oct 15, 2026LT · E 121Q32.80″—7.5–9.059.5 lb20.0/32″—
Firestone Transforce HT3firestonetire.com · Oct 15, 2026LT · E 126R32.80″—7.5–9.049.7 lb15.0/32″—
Firestone Transforce AT2firestonetire.com · Oct 15, 2026LT · E 121R32.80″—7.5–9.050.1 lb18.0/32″—
Kumho Road Venture AT52kumhotireusa.com · Oct 15, 2026LT · E 121/118R32.80″11.50″7.5–9.554.6 lb16.0/32″3,195 lb @ 80 psi
Kumho Road Venture RTkumhotireusa.com · Oct 15, 2026LT · E 121/118R32.80″11.50″7.5–9.560.8 lb17.3/32″3,195 lb @ 80 psi
Toyo Open Country R/T Trailtoyotires.com · Oct 15, 2026LT · E 126/123Q32.80″11.50″7.5–9.557.0 lb16.5/32″3,750 lb @ 80 psi
Toyo Open Country H/T IItoyotires.com · Oct 15, 2026LT · E 121/118S32.80″11.50″7.5–9.053.0 lb15.8/32″3,195 lb @ 80 psi
Kumho Road Venture MT71kumhotireusa.com · Oct 15, 2026LT · E 121/118Q33.00″11.50″7.5–9.066.9 lb19.0/32″3,195 lb @ 80 psi
Mickey Thompson Baja Boss A/Tmickeythompsontires.com · Oct 15, 2026LT · E 121Q33.00″11.50″7.5–9.563.0 lb18.5/32″3,195 lb @ 80 psi
Mickey Thompson Baja Legend MTZmickeythompsontires.com · Oct 15, 2026LT · E 121Q33.00″11.50″7.5–9.562.0 lb19.0/32″3,195 lb @ 80 psi
Mickey Thompson Baja Boss M/Tmickeythompsontires.com · Oct 15, 2026LT · E 121Q33.00″11.50″7.5–9.563.0 lb19.0/32″3,195 lb @ 80 psi
Toyo Open Country A/T IIItoyotires.com · Oct 15, 2026LT · E 121/118S33.00″11.50″7.5–9.553.0 lb16.5/32″3,195 lb @ 80 psi
Toyo Open Country R/Ttoyotires.com · Oct 15, 2026LT · E 121/118Q33.00″11.50″7.5–9.060.0 lb16.4/32″3,195 lb @ 80 psi
Toyo Open Country M/Ttoyotires.com · Oct 15, 2026LT · E 121/118P33.00″11.50″7.5–9.064.0 lb18.9/32″3,195 lb @ 80 psi
Mickey Thompson Baja Legend EXPmickeythompsontires.com · Oct 15, 2026LT · E 121Q33.10″11.50″7.5–9.557.0 lb18.5/32″3,195 lb @ 80 psi
Nitto Trail Grappler M/Tnittotire.com · Oct 15, 2026LT · E 121/118Q33.15″11.81″7.5–9.566.4 lb18.9/32″3,195 lb @ 80 psi
Nitto Ridge Grapplernittotire.com · Oct 15, 2026SL 116Q32.76″11.50″7.5–9.548.7 lb13.5/32″2,756 lb @ 44 psi
Nitto Recon Grappler A/Tnittotire.com · Oct 15, 2026SL 116T32.76″11.50″7.5–9.548.9 lb13.6/32″2,756 lb @ 44 psi
Nitto Terra Grappler G3nittotire.com · Oct 15, 2026SL 116T32.76″11.50″7.5–9.548.2 lb13.6/32″2,756 lb @ 44 psi
Firestone Destination A/T2firestonetire.com · Oct 15, 2026SL 117T32.80″—7.5–9.542.1 lb12.0/32″—
Mickey Thompson Baja Boss A/Tmickeythompsontires.com · Oct 15, 2026SL 116T32.80″11.60″7.5–9.548.0 lb16.0/32″2,756 lb @ 44 psi
Toyo Open Country A/T IIItoyotires.com · Oct 15, 2026SL 117T32.80″11.50″7.5–9.546.0 lb13.6/32″2,833 lb @ 44 psi
Toyo Open Country R/T Trailtoyotires.com · Oct 15, 2026SL 116Q32.80″11.50″7.5–9.549.0 lb13.6/32″2,756 lb @ 44 psi

§ 1

Nominal numbers

By the formula the overall diameter is 32.7 in (831 mm).

Section width is 11.2 in (285 mm). Sidewall height is 7.9 in (200 mm). Rim is 17 in (432 mm). Circumference is 102.8 in (2,610 mm). Revolutions are 617 per mile (383 per km).

  • Overall diameter: 32.7 in (831 mm) — by the formula.
  • Section width: 11.2 in (285 mm).
  • Sidewall height: 7.9 in (200 mm).
  • Rim: 17 in (432 mm).
  • Circumference: 102.8 in (2,610 mm).
  • Revolutions: 617 per mile (383 per km).

§ 2

Published measurements

Tire makers' size tables list 28 tires in 285/70R17 from 5 brands: Nitto, Firestone, Kumho, Toyo and Mickey Thompson. Of those 28 entries 21 are LT and 7 are P-metric or passenger versions; listed load ranges include SL and E.

Published overall diameters run from 32.76 in to 33.15 in against 32.71 in by the formula (+0.2% to +1.3%). Weights run from 42.1 lbs to 66.9 lbs. New tread depths run from 12/32 in to 20/32 in.

  • Number of tires listed: 28 from 5 brands (21 LT, 7 P).
  • Published diameters: 32.76 in → 33.15 in (range).
  • Weights: 42.1 lbs → 66.9 lbs. New tread: 12/32 in → 20/32 in.

§ 3

Closest sizes

The neighbors table uses a ±3% overall-diameter window. The ±3% window is a tire-shop rule of thumb, not a law. For any other size, use the comparison tool.

Closest sizes on 16–18 in rims include 235/80R18 (32.8 in, +0.3%) and 305/65R17 (32.6 in, −0.3%). From 285/70R17 to 235/80R18 the diameter is +0.3% (+0.09 in, +2 mm); at an indicated 60 mph the true speed is 60.2 mph and revolutions change 617 → 615. From 285/70R17 to 305/65R17 the diameter is −0.3% (−0.10 in, −3 mm); at an indicated 60 mph the true speed is 59.8 mph and revolutions change 617 → 618. See the speedometer calculator for other comparisons.

  • Examples inside ±3%: 235/80R18 (32.8 in, +0.3%), 305/65R17 (32.6 in, −0.3%).
  • 235/80R18: indicated 60 mph → true 60.2 mph; revs 617 → 615.
  • 305/65R17: indicated 60 mph → true 59.8 mph; revs 617 → 618.

Fig. 2

285/70R17 and the sizes next to it

To scale, on one ground line. Diameter by the formula.

32.6″305/65R1732.7″285/70R1732.8″235/80R18
32.6″305/65R1732.7″285/70R1732.8″235/80R18

Table 4

Compare 285/70R17 with another size

Type any size: diameter, sidewall, speedometer and clearance change against this one.

Input

1 · This size285/70R17

−3.37% — outside the ±3% rule of thumb tire shops use. Expect a speedometer error, and check clearance at full lock and full compression before you buy.

Comparison

265/70R17 is 31.61″ tall, −3.37% against 285/70R17. At 60 mph on the dial you drive 58.0 mph.

285/70R17 vs 265/70R17
Item285/70R17265/70R17Change
Overall diameter32.71″31.61″−1.10″ −3.37%
Section width11.22″10.43″−0.79″
Sidewall7.85″7.30″−0.55″
Circumference102.8″99.3″−3.5″
Revs per mile617638+22
Axle height16.35″15.80″−0.55″

When the odometer counts 1,000 miles, you have driven 966.3 miles.

Engine RPM at the same road speed: +3.5%. Gear ratio calculator

Speedometer

Speedometer reading and true speed
Dial showsTrue speedDifference
30 mph29.0 mph−1.0
45 mph43.5 mph−1.5
60 mph58.0 mph−2.0
70 mph67.6 mph−2.4
80 mph77.3 mph−2.7
32.7″31.6″−0.55″

285/70R17265/70R17

Note 1

P-metric or LT in the same size

Nitto Ridge Grappler is published in both versions.

Nitto Ridge Grappler, 285/70R17: P and LT
Nitto Ridge GrapplerP · 116QLT · E · 121/118Q
Overall diameter32.76″32.76″
Max load2,756 lb @ 44 psi3,195 lb @ 80 psi
Weight48.7 lb57.9 lb
Tread depth13.5/32″16.4/32″
Approved rims7.5–9.5″7.5–9.5″

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 285/70R17: 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 285/70R17

Same rim or ±1″, diameter within 3%. A shop rule of thumb, not a law.

Sizes within 3% of 285/70R17
SizeDiameterWidthvs 285/70R17At 60 mphClearance
235/80R1832.80″9.3″+0.3%60.2+0.05″
305/65R1732.61″12.0″−0.3%59.8−0.05″
265/70R1832.61″10.4″−0.3%59.8−0.05″
305/70R1632.81″12.0″+0.3%60.2+0.05″
285/65R1832.59″11.2″−0.4%59.8−0.06″
285/75R1632.83″11.2″+0.4%60.2+0.06″
33x11.50R1633.00″11.5″+0.9%60.5+0.15″
33x11.50R1733.00″11.5″+0.9%60.5+0.15″
33x11.50R1833.00″11.5″+0.9%60.5+0.15″
33x12.50R1733.00″12.5″+0.9%60.5+0.15″

Q&A

Common questions

What does 285/70R17 mean in inches?

Section width is 11.2 in (285 mm). Sidewall height is 7.9 in (200 mm). Overall diameter by the formula is 32.7 in (831 mm).

How many manufacturers list this size?

Makers' size tables list 28 tires in 285/70R17 from 5 brands. Of those, 21 entries are LT and 7 are P-metric or passenger versions.

Where is tire load information shown?

FMVSS No. 139 requires the sidewall to show the maximum load rating and, for LT tires, the load range letter.

Where do I find the vehicle inflation pressure?

FMVSS No. 110 says the tire and loading placard is on the driver's side B-pillar (door jamb) and lists the vehicle maker's recommended cold inflation pressures.

Notes

Method and sources

Each number and rule comes from a source with the date it was checked.

  1. Sidewall = width × aspect ratio ÷ 100
  2. Diameter = rim × 25.4 + 2 × sidewall (mm)
  3. Revs per mile = 63,360 ÷ (π × diameter, in)
  4. True speed = dial × new diameter ÷ old diameter
  5. 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.

  1. Nitto: size table (nittotire.com)checked Oct 15, 2026
  2. Toyo: size table (toyotires.com)checked Oct 15, 2026
  3. Mickey Thompson: size table (mickeythompsontires.com)checked Oct 15, 2026
  4. 49 CFR 571.139 (FMVSS No. 139), S5.5(d)ecfr.gov · checked Oct 15, 2026
  5. 49 CFR 571.110 (FMVSS No. 110), S4.3ecfr.gov · checked Oct 15, 2026

Related

Calculators and size classes

33″22 metric and 11 flotation sizes measure 32.5–33.5″ by the formula305/70R16 · 285/75R16 · 295/75R16 · 305/65R17 · 285/70R1735″15 metric and 16 flotation sizes measure 34.5–35.5″ by the formula315/75R16 · 325/65R18 · 305/70R18 · 285/75R18 · 285/65R2037″3 metric and 13 flotation sizes measure 36.5–37.5″ by the formula385/70R16 · 315/80R17 · 375/45R24