Sheet TS-315/70R17Rev. Oct 15, 2026United States · Canada

Data sheet TS-315/70R17 · Size

315/70R17 in inches

315/70R17 measures 34.4 in overall diameter by the nominal formula. It has a 12.4 in section width and an 8.7 in sidewall.

Fig. 1 — Cross-section

D34.4″B8.7″C17″A12.4″
A section width, B sidewall, C rim, D overall diameter. Nominal, on the measuring rim.

Table 1 — Nominal dimensions

315/70R17: nominal dimensions in inches and millimeters
Iteminmm
Overall diameter34.36873
Section width12.40315
Sidewall8.68220.5
Rim17431.8
Circumference108.02,742
Revs per mile · km587365
From the makers’ size tables
Flotation size printed35X12.50R17LTMickey Thompson
Measuring rim9.5″Kumho LT
Approved rims8.5–10.0, 8.0–10.5, 8.0–11.0″14 LT tires

Table 2 — Measured range

34.40–34.61″overall diameter, 15 tires from 5 makers (math: 34.36″)

60–78 lbweight, 14 LT versions

14.0–21.0/32″new tread depth

3,195–3,750 lbmax load per tire, 12 of 14 LT versions list it, as published

14 LT · 1 Pversions in the makers’ tables we read

All 15 tires ↓

Table 3

15 tires in 315/70R17, 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 34.36″. 15 tires from 5 makers measure 34.40″–34.61″. Tallest here: Nitto Trail Grappler M/T (mud-terrain), 34.61″. Check the maker’s number before you buy for a tight fit.

Published dimensions for 315/70R17
TireTypeDiameterWidthRims, inWeightTreadMax load
Firestone Destination X/Tfirestonetire.com · Oct 15, 2026LT · E 121R34.40″—8.5–10.061.5 lb17.0/32″—
Firestone Destination M/T2firestonetire.com · Oct 15, 2026LT · E 121Q34.40″—8.5–10.066.8 lb21.0/32″—
Kumho Road Venture AT52kumhotireusa.com · Oct 15, 2026LT · E 121/118S34.40″12.70″8.0–10.560.3 lb16.0/32″3,195 lb @ 80 psi
Toyo Open Country A/T IIItoyotires.com · Oct 15, 2026LT · D 121/118S34.40″12.70″8.0–10.567.0 lb16.9/32″3,195 lb @ 50 psi
Toyo Open Country R/T Trailtoyotires.com · Oct 15, 2026LT · D 121/118S34.40″12.70″8.0–10.568.0 lb16.9/32″3,195 lb @ 50 psi
Nitto Ridge Grapplernittotire.com · Oct 15, 2026LT · E 121/118Q34.41″12.72″8.0–10.570.8 lb16.4/32″3,195 lb @ 65 psi
Nitto Recon Grappler A/Tnittotire.com · Oct 15, 2026LT · E 126/123R34.41″12.72″8.0–10.567.4 lb16.3/32″3,750 lb @ 65 psi
Mickey Thompson Baja Boss A/Tmickeythompsontires.com · Oct 15, 2026LT · E 121Q34.50″12.80″8.0–11.071.0 lb18.5/32″3,195 lb @ 65 psi
Kumho Road Venture MT71kumhotireusa.com · Oct 15, 2026LT · E 121/118Q34.60″12.70″8.0–11.077.7 lb20.0/32″3,195 lb @ 65 psi
Mickey Thompson Baja Legend EXPmickeythompsontires.com · Oct 15, 2026LT · D 121Q34.60″12.80″8.0–11.062.0 lb18.5/32″3,195 lb @ 50 psi
Mickey Thompson Baja Legend MTZmickeythompsontires.com · Oct 15, 2026LT · E 121Q34.60″12.60″8.0–11.067.0 lb21.0/32″3,195 lb @ 65 psi
Mickey Thompson Baja Boss M/Tmickeythompsontires.com · Oct 15, 2026LT · E 121Q34.60″12.60″8.0–11.070.0 lb21.0/32″3,195 lb @ 65 psi
Toyo Open Country M/Ttoyotires.com · Oct 15, 2026LT · E 121/118Q34.60″12.70″8.0–11.078.0 lb20.2/32″3,195 lb @ 65 psi
Nitto Trail Grappler M/Tnittotire.com · Oct 15, 2026LT · D 121/118Q34.61″13.27″8.0–10.576.8 lb20.0/32″3,195 lb @ 50 psi
Nitto Recon Grappler A/Tnittotire.com · Oct 15, 2026SL 116T34.41″12.72″8.0–10.564.1 lb14.0/32″2,756 lb @ 44 psi

§ 1

What the size measures

By the formula, 315/70R17 is nominally 34.4 in overall diameter (873 mm). The section width is 12.4 in (315 mm) and the sidewall height is 8.7 in (221 mm). The rim is 17 in (432 mm).

Circumference is 108.0 in (2,742 mm), giving 587 revolutions per mile (365 per km). These are unloaded nominal numbers calculated from the nominal-size math.

  • Nominal sidewall = section width × aspect ratio ÷ 100.
  • Nominal revolutions per mile = 63,360 ÷ (π × diameter in inches).

§ 2

What makers publish

Makers list 15 tires in 315/70R17 from Firestone, Kumho, Toyo, Nitto and Mickey Thompson. Fourteen entries are LT and one is a P-metric or passenger entry. Load ranges in the tables include SL, D and E.

Published overall diameters run 34.4 in to 34.61 in, about +0.1% to +0.7% above the nominal value. Weights listed run from 60.3 lbs to 78 lbs and new tread depths from 14/32 in to 21/32 in.

  • Firestone Destination X/T — diameter 34.4 in; weight 61.5 lbs; tread depth 17/32 in (Firestone).
  • Kumho Road Venture AT52 — diameter 34.4 in; measured width 12.7 in; weight 60.3 lbs; tread depth 16/32 in; max load 3,195 lbs at 80 psi (Kumho).
  • Mickey Thompson Baja Boss A/T — diameter 34.5 in; width 12.8 in; weight 71 lbs; tread depth 18.5/32 in; maker lists equivalent 35X12.50R17LT (Mickey Thompson).

§ 3

Closest sizes and effects

The ±3% overall-diameter window is a tire-shop rule of thumb, not a law or a vehicle-maker specification. Sizes within that window on 16–18 in rims include 295/75R17, 295/70R18 and 315/75R16 among others. Use the comparison tool for side-by-side numbers.

Small diameter differences change indicated versus true speed, revolutions per mile and axle height. The site's tools and the speedometer calculator show exact changes for a candidate size.

  • 295/75R17 — diameter 34.4 in, +0.2% (+0.06 in); revs per mile 587 → 586; indicated 60 mph → true 60.1 mph; axle +0.03 in (+1 mm).
  • 295/70R18 — diameter 34.3 in, −0.3% (−0.10 in); revs per mile 587 → 589; indicated 60 mph → true 59.8 mph; axle −0.05 in (−1 mm).
  • 315/75R16 — diameter 34.6 in, +0.7% (+0.24 in); revs per mile 587 → 583; indicated 60 mph → true 60.4 mph; axle +0.12 in (+3 mm).

Fig. 2

315/70R17 and the sizes next to it

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

34.3″295/70R1834.4″315/70R1734.4″295/75R17
34.3″295/70R1834.4″315/70R1734.4″295/75R17

Table 4

Compare 315/70R17 with another size

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

Input

1 · This size315/70R17

−4.81% — 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

285/70R17 is 32.71″ tall, −4.81% against 315/70R17. At 60 mph on the dial you drive 57.1 mph.

315/70R17 vs 285/70R17
Item315/70R17285/70R17Change
Overall diameter34.36″32.71″−1.65″ −4.81%
Section width12.40″11.22″−1.18″
Sidewall8.68″7.85″−0.83″
Circumference108.0″102.8″−5.2″
Revs per mile587617+30
Axle height17.18″16.35″−0.83″

When the odometer counts 1,000 miles, you have driven 951.9 miles.

Engine RPM at the same road speed: +5.1%. Gear ratio calculator

Speedometer

Speedometer reading and true speed
Dial showsTrue speedDifference
30 mph28.6 mph−1.4
45 mph42.8 mph−2.2
60 mph57.1 mph−2.9
70 mph66.6 mph−3.4
80 mph76.2 mph−3.8
34.4″32.7″−0.83″

315/70R17285/70R17

Note 1

P-metric or LT in the same size

Nitto Recon Grappler A/T is published in both versions.

Nitto Recon Grappler A/T, 315/70R17: P and LT
Nitto Recon Grappler A/TP · 116TLT · E · 126/123R
Overall diameter34.41″34.41″
Max load2,756 lb @ 44 psi3,750 lb @ 65 psi
Weight64.1 lb67.4 lb
Tread depth14.0/32″16.3/32″
Approved rims8.0–10.5″8.0–10.5″

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 315/70R17: 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 315/70R17

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

Sizes within 3% of 315/70R17
SizeDiameterWidthvs 315/70R17At 60 mphClearance
295/75R1734.42″11.6″+0.2%60.1+0.03″
295/70R1834.26″11.6″−0.3%59.8−0.05″
315/75R1634.60″12.4″+0.7%60.4+0.12″
325/65R1834.63″12.8″+0.8%60.5+0.14″
255/85R1734.07″10.0″−0.9%59.5−0.15″
34x10.50R1734.00″10.5″−1.1%59.4−0.18″
305/70R1834.81″12.0″+1.3%60.8+0.22″
285/75R1834.83″11.2″+1.4%60.8+0.23″
285/75R1733.83″11.2″−1.5%59.1−0.27″
305/70R1733.81″12.0″−1.6%59.0−0.28″

Q&A

Common questions

How tall is a 315/70R17 tire?

By the nominal-size formula it measures 34.4 in overall diameter (873 mm). Makers publish diameters from 34.4 in to 34.61 in.

How many revolutions per mile does it make?

Nominal revolutions per mile are 587 (365 per km). Some maker entries list slightly different revs for specific models.

What load-range markings should I check?

Most published 315/70R17 entries are LT and makers list load ranges SL, D and E. The sidewall shows the maximum load rating and, for LT tires, the load-range letter (49 CFR 571.139 (FMVSS No. 139)).

Will swapping to a nearby size affect the speedometer?

Yes. Small diameter differences change indicated versus true speed. Use the site's speedometer calculator or the comparison tool to see exact changes for a candidate size.

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. Firestone: size table (firestonetire.com)checked Oct 15, 2026
  2. Kumho: size table (kumhotireusa.com)checked Oct 15, 2026
  3. Toyo: size table (toyotires.com)checked Oct 15, 2026
  4. Nitto: size table (nittotire.com)checked Oct 15, 2026
  5. Mickey Thompson: size table (mickeythompsontires.com)checked Oct 15, 2026
  6. Firestone: size table (firestonetire.com)checked Oct 15, 2026
  7. Toyo: size table (toyotires.com)checked Oct 15, 2026
  8. Nitto: size table (nittotire.com)checked Oct 15, 2026
  9. Kumho: size table (kumhotireusa.com)checked Oct 15, 2026
  10. Mickey Thompson: size table (mickeythompsontires.com)checked Oct 15, 2026
  11. 49 CFR 571.139 (FMVSS No. 139), S5.5(d)ecfr.gov · checked Oct 15, 2026
  12. 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