Data sheet TS-295/70R18 · Size

295/70R18 in inches

295/70R18 measures 34.3 in overall diameter by the formula and 11.6 in section width; it makes 589 revs per mile.

Fig. 1 — Cross-section

A section width, B sidewall, C rim, D overall diameter. Nominal, on the measuring rim.

Table 1 — Nominal dimensions

295/70R18: nominal dimensions in inches and millimeters
Item	in	mm
Overall diameter	34.26	870
Section width	11.61	295
Sidewall	8.13	206.5
Rim	18	457.2
Circumference	107.6	2,734
Revs per mile · km	589	366

From the makers’ size tables
Flotation size printed	34X12.00R18LT	Mickey Thompson
Measuring rim	8.5″	Nitto LT
Approved rims	7.5–10.0″	13 LT tires

Table 2 — Measured range

34.29–34.57″overall diameter, 14 tires from 5 makers (math: 34.26″)

57–74 lbweight, 13 LT versions

13.7–21.0/32″new tread depth

4,080 lbmax load per tire, 12 of 13 LT versions list it, as published

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

All 14 tires ↓

Table 3

14 tires in 295/70R18, 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 34.26″. 14 tires from 5 makers measure 34.29″–34.57″. Tallest here: Nitto Trail Grappler M/T (mud-terrain), 34.57″. Check the maker’s number before you buy for a tight fit.

Published dimensions for 295/70R18
Tire	Type	Diameter	Width	Rims, in	Weight	Tread	Max load
Nitto Ridge Grapplernittotire.com · Oct 15, 2026	LT · E 129/126Q	34.29″	11.77″	7.5–10.0	69.4 lb	16.4/32″	4,080 lb @ 80 psi
Nitto Recon Grappler A/Tnittotire.com · Oct 15, 2026	LT · E 129/126R	34.29″	11.77″	7.5–10.0	63.6 lb	16.1/32″	4,080 lb @ 80 psi
Firestone Destination M/T2firestonetire.com · Oct 15, 2026	LT · E 129Q	34.30″	—	7.5–10.0	65.8 lb	21.0/32″	—
Kumho Road Venture AT52kumhotireusa.com · Oct 15, 2026	LT · E 129/126S	34.30″	11.80″	7.5–10.0	57.0 lb	16.0/32″	4,080 lb @ 80 psi
Kumho Road Venture RTkumhotireusa.com · Oct 15, 2026	LT · E 129/126R	34.30″	11.80″	7.5–10.0	69.4 lb	17.3/32″	4,080 lb @ 80 psi
Toyo Open Country A/T IIItoyotires.com · Oct 15, 2026	LT · E 129/126S	34.30″	11.80″	7.5–10.0	63.0 lb	16.6/32″	4,080 lb @ 80 psi
Toyo Open Country R/T Trailtoyotires.com · Oct 15, 2026	LT · E 129/126Q	34.30″	11.80″	7.5–10.0	65.0 lb	16.6/32″	4,080 lb @ 80 psi
Mickey Thompson Baja Legend EXPmickeythompsontires.com · Oct 15, 2026	LT · E 129Q	34.40″	12.00″	7.5–10.0	61.0 lb	18.5/32″	4,080 lb @ 80 psi
Kumho Road Venture MT71kumhotireusa.com · Oct 15, 2026	LT · E 129/126Q	34.50″	11.80″	7.5–10.0	73.6 lb	20.0/32″	4,080 lb @ 80 psi
Mickey Thompson Baja Boss A/Tmickeythompsontires.com · Oct 15, 2026	LT · E 129Q	34.50″	11.70″	7.5–10.0	73.0 lb	18.5/32″	4,080 lb @ 80 psi
Mickey Thompson Baja Legend MTZmickeythompsontires.com · Oct 15, 2026	LT · E 129P	34.50″	12.00″	7.5–10.0	68.0 lb	21.0/32″	4,080 lb @ 80 psi
Toyo Open Country M/Ttoyotires.com · Oct 15, 2026	LT · E 129/126P	34.50″	11.80″	7.5–10.0	72.0 lb	19.4/32″	4,080 lb @ 80 psi
Nitto Trail Grappler M/Tnittotire.com · Oct 15, 2026	LT · E 129/126Q	34.57″	11.73″	7.5–10.0	72.8 lb	19.4/32″	4,080 lb @ 80 psi
Nitto Recon Grappler A/Tnittotire.com · Oct 15, 2026	SL 116S	34.29″	11.77″	7.5–10.0	52.5 lb	13.7/32″	2,756 lb @ 44 psi

§ 1

Nominal dimensions

By the formula the size has an overall diameter of 34.3 in (870 mm), a section width of 11.6 in (295 mm), a sidewall height of 8.1 in (207 mm) and an 18 in (457 mm) rim.

Unloaded nominal circumference is 107.6 in (2,734 mm). Revolutions per mile are 589 (366 per km). The formula: sidewall = section width × aspect ratio / 100; overall diameter = rim × 25.4 mm + 2 × sidewall.

§ 2

Published measurements

Makers list 14 tires in 295/70R18 from five brands; 13 are LT and one is P-metric. Published overall diameters run from 34.29 in to 34.57 in, about +0.1% to +0.9% versus the formula value.

Model entries show variation in weight and tread. Nitto lists the Ridge Grappler LT295/70R18 at 34.29 in overall diameter, weight 69.4 lbs and tread depth 16.4/32 in. Firestone lists the Destination M/T2 at 34.3 in and tread depth 21/32 in (weight 65.8 lbs). Mickey Thompson lists the Baja Legend EXP at 34.4 in overall diameter, section width 12.0 in and tread depth 18.5/32 in; the maker lists the equivalent as 34X12.00R18LT. Toyo shows some models at 606 revs per mile.

§ 3

Closest sizes

Neighbors use a ±3% overall-diameter window on nearby rim sizes; the ±3% window is a tire-shop rule of thumb, not a law.

Examples inside that window include 315/70R17 (34.4 in, +0.3%), 255/85R17 (34.1 in, −0.6%) and 285/75R17 (33.8 in, −1.3%). From 295/70R18 to 315/70R17 the diameter increases +0.3% (+0.10 in, +3 mm); an indicated 60 mph becomes 60.2 mph (100.3 km/h) and axle ground clearance changes by +0.05 in (+1 mm). From 295/70R18 to 255/85R17 the diameter is −0.6% (−0.19 in, −5 mm); an indicated 60 mph becomes 59.7 mph (99.4 km/h) and axle ground clearance changes by −0.10 in (−2 mm).

The comparison tool checks revolutions per mile and the speedometer for any other size.
The neighbor table covers rims from 17 to 19 in.

Fig. 2

295/70R18 and the sizes next to it

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

Table 4

Compare 295/70R18 with another size

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

Comparison

305/70R18 is 34.81″ tall, +1.61% against 295/70R18. At 60 mph on the dial you drive 61.0 mph.

295/70R18 vs 305/70R18
Item	295/70R18	305/70R18	Change
Overall diameter	34.26″	34.81″	+0.55″ +1.61%
Section width	11.61″	12.01″	+0.39″
Sidewall	8.13″	8.41″	+0.28″
Circumference	107.6″	109.4″	+1.7″
Revs per mile	589	579	−9
Axle height	17.13″	17.41″	+0.28″

When the odometer counts 1,000 miles, you have driven 1,016.1 miles.

Engine RPM at the same road speed: −1.6%. Gear ratio calculator

Speedometer

Speedometer reading and true speed
Dial shows	True speed	Difference
30 mph	30.5 mph	+0.5
45 mph	45.7 mph	+0.7
60 mph	61.0 mph	+1.0
70 mph	71.1 mph	+1.1
80 mph	81.3 mph	+1.3

295/70R18305/70R18

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, 295/70R18: P and LT
Nitto Recon Grappler A/T	P · 116S	LT · E · 129/126R
Overall diameter	34.29″	34.29″
Max load	2,756 lb @ 44 psi	4,080 lb @ 80 psi
Weight	52.5 lb	63.6 lb
Tread depth	13.7/32″	16.1/32″
Approved rims	7.5–10.0″	7.5–10.0″

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 295/70R18: 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 295/70R18

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

Sizes within 3% of 295/70R18
Size	Diameter	Width	vs 295/70R18	At 60 mph	Clearance
315/70R17	34.36″	12.4″	+0.3%	60.2	+0.05″
295/75R17	34.42″	11.6″	+0.5%	60.3	+0.08″
255/85R17	34.07″	10.0″	−0.6%	59.7	−0.10″
34x10.50R17	34.00″	10.5″	−0.8%	59.5	−0.13″
325/65R18	34.63″	12.8″	+1.1%	60.7	+0.19″
285/75R17	33.83″	11.2″	−1.3%	59.2	−0.21″
305/70R17	33.81″	12.0″	−1.3%	59.2	−0.22″
285/70R18	33.71″	11.2″	−1.6%	59.0	−0.28″
305/70R18	34.81″	12.0″	+1.6%	61.0	+0.28″
285/75R18	34.83″	11.2″	+1.7%	61.0	+0.29″

Other 18″ sizes

Q&A

Common questions

How big is a 295/70R18 in inches?

By the nominal formula 295/70R18 measures 34.3 in overall diameter and 11.6 in section width, and makes 589 revs per mile (366 per km).

How many makers publish 295/70R18 sizes?

Makers list 14 tires in 295/70R18 from five brands; 13 entries are LT and one is P-metric. Published diameters run from 34.29 in to 34.57 in.

Where is the tire load rating and load range shown?

The sidewall shows the maximum load rating and, for LT tires, the letter designating the tire load range (49 CFR 571.139 (FMVSS No. 139)).

Where do I find the vehicle inflation pressure?

See the tire and loading placard on the driver's side B-pillar (door jamb); the placard lists the vehicle maker’s recommended cold inflation pressure for front, rear and spare tires (49 CFR 571.110 (FMVSS No. 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.

Nitto: size table (nittotire.com)checked Oct 15, 2026
Firestone: size table (firestonetire.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

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 · 285/70R17 35″15 metric and 16 flotation sizes measure 34.5–35.5″ by the formula315/75R16 · 325/65R18 · 305/70R18 · 285/75R18 · 285/65R20 37″3 metric and 13 flotation sizes measure 36.5–37.5″ by the formula385/70R16 · 315/80R17 · 375/45R24