Data sheet TS-265/60R18 · Size

265/60R18 in inches

By the formula 265/60R18 measures 30.5 in (775 mm) overall diameter, a 10.4 in (265 mm) section width and 661 revolutions 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

265/60R18: nominal dimensions in inches and millimeters
Item	in	mm
Overall diameter	30.52	775
Section width	10.43	265
Sidewall	6.26	159.0
Rim	18	457.2
Circumference	95.9	2,435
Revs per mile · km	661	411

From the makers’ size tables
Flotation size printed	31X10.50R18LT	Mickey Thompson
Measuring rim	8″	Mickey Thompson LT
Approved rims	7.5–9.5, 8.0–9.5″	4 LT tires

Table 2 — Measured range

30.50–30.80″overall diameter, 17 tires from 5 makers (math: 30.52″)

48–57 lbweight, 4 LT versions

10.0–18.5/32″new tread depth

3,000 lbmax load per tire, 4 LT versions, as published

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

All 17 tires ↓

Table 3

17 tires in 265/60R18, 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 30.52″. 17 tires from 5 makers measure 30.50″–30.80″. Tallest here: Mickey Thompson Baja Boss A/T (all-terrain), 30.80″. Check the maker’s number before you buy for a tight fit.

Published dimensions for 265/60R18
Tire	Type	Diameter	Width	Rims, in	Weight	Tread	Max load
Mickey Thompson Baja Legend EXPmickeythompsontires.com · Oct 15, 2026	LT · E 119Q	30.50″	10.70″	7.5–9.5	51.0 lb	18.5/32″	3,000 lb @ 80 psi
Toyo Open Country A/T IIItoyotires.com · Oct 15, 2026	LT · E 119/116S	30.50″	10.70″	8.0–9.5	50.0 lb	16.3/32″	3,000 lb @ 80 psi
Nitto Terra Grappler G3nittotire.com · Oct 15, 2026	LT · E 119/116T	30.51″	10.71″	8.0–9.5	47.7 lb	15.7/32″	3,000 lb @ 80 psi
Mickey Thompson Baja Boss A/Tmickeythompsontires.com · Oct 15, 2026	LT · E 119Q	30.80″	10.70″	7.5–9.5	57.0 lb	18.5/32″	3,000 lb @ 80 psi
Firestone Destination A/T2firestonetire.com · Oct 15, 2026	SL 109T	30.50″	—	7.0–9.5	38.1 lb	12.0/32″	—
Firestone Destination LE3firestonetire.com · Oct 15, 2026	SL 110T	30.50″	—	7.5–9.5	34.4 lb	10.0/32″	—
Firestone Destination LE4firestonetire.com · Oct 15, 2026	SL 110T	30.50″	—	7.5–9.5	35.7 lb	12.0/32″	—
Kumho Road Venture AT52kumhotireusa.com · Oct 15, 2026	SL 110T	30.50″	10.70″	7.5–9.5	38.8 lb	13.5/32″	2,337 lb @ 51 psi
Kumho Road Venture RTkumhotireusa.com · Oct 15, 2026	XL 114S	30.50″	10.70″	7.5–9.5	42.4 lb	13.5/32″	2,601 lb @ 50 psi
Kumho Crugen HT51kumhotireusa.com · Oct 15, 2026	SL 110T	30.50″	10.70″	7.5–9.5	36.1 lb	12.5/32″	2,337 lb @ 51 psi
Kumho Crugen Premiumkumhotireusa.com · Oct 15, 2026	SL 109H	30.50″	10.70″	7.5–9.5	34.0 lb	10.0/32″	2,271 lb @ 51 psi
Toyo Open Country A/T IIItoyotires.com · Oct 15, 2026	SL 110T	30.50″	10.70″	7.5–9.5	38.0 lb	13.3/32″	2,337 lb @ 44 psi
Toyo Open Country H/T IItoyotires.com · Oct 15, 2026	SL 110T	30.50″	10.70″	7.5–9.5	39.0 lb	11.8/32″	2,337 lb @ 44 psi
Nitto Ridge Grapplernittotire.com · Oct 15, 2026	XL 114S	30.51″	10.71″	7.5–9.5	41.5 lb	13.5/32″	2,601 lb @ 50 psi
Nitto Terra Grappler G3nittotire.com · Oct 15, 2026	XL 114T	30.51″	10.71″	7.5–9.5	40.4 lb	13.4/32″	2,601 lb @ 50 psi
Nitto Dura Grapplernittotire.com · Oct 15, 2026	SL 110H	30.60″	10.70″	7.5–9.5	39.3 lb	12.9/32″	2,337 lb @ 51 psi
Mickey Thompson Baja Boss A/Tmickeythompsontires.com · Oct 15, 2026	XL 114T	30.80″	10.60″	7.5–9.5	44.0 lb	16.0/32″	2,601 lb @ 50 psi

§ 1

Nominal numbers

By the formula 265/60R18 measures 30.5 in (775 mm) overall diameter. The section width is 10.4 in (265 mm) and the sidewall height is 6.3 in (159 mm) on an 18 in (457 mm) rim.

Circumference is 95.9 in (2,435 mm). Revolutions are 661 per mile (411 per km).

§ 2

Published measurements

Tire makers list 17 tires in 265/60R18 from 5 brands: 4 LT and 13 P-metric or passenger versions. Makers list load ranges SL, XL and E. Published overall diameters run from 30.5 in to 30.8 in, versus 30.52 in by the formula (−0.1% to +0.9%).

Weights among listed models run from 34 lbs to 57 lbs. New tread depths run from 10/32 in to 18.5/32 in. Federal rule 49 CFR 571.139 requires makers to publish the rims that may be used with each tire.

Mickey Thompson Baja Legend EXP (LT265/60R18): overall diameter 30.5 in; section width 10.7 in; weight 51 lbs; tread depth 18.5/32 in. (Mickey Thompson)
Toyo Open Country A/T III (LT265/60R18): overall diameter 30.5 in; overall width, inflated 10.7 in; weight 50 lbs; tread depth 16.3/32 in; 681 revs per mile. (Toyo)
Mickey Thompson Baja Boss A/T (LT265/60R18): overall diameter 30.8 in; section width 10.7 in; weight 57 lbs; tread depth 18.5/32 in. (Mickey Thompson)

§ 3

Nearby sizes and changes

Neighbors within a ±3% overall-diameter window include 245/70R17 (30.5 in, −0.1%) and 265/65R17 (30.6 in, +0.1%). The ±3% window is a tire-shop rule of thumb, not a law.

Small diameter changes give small speedometer and clearance effects. From 265/60R18 to 245/70R17 the true speed at an indicated 60 mph is 60.0 mph and axle clearance changes by −0.01 in (0 mm). From 265/60R18 to 265/65R17 the true speed at an indicated 60 mph is 60.1 mph and axle clearance changes by +0.02 in (+1 mm). See the comparison tool or the speedometer calculator for other sizes.

Fig. 2

265/60R18 and the sizes next to it

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

Table 4

Compare 265/60R18 with another size

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

Comparison

265/65R18 is 31.56″ tall, +3.42% against 265/60R18. At 60 mph on the dial you drive 62.1 mph.

265/60R18 vs 265/65R18
Item	265/60R18	265/65R18	Change
Overall diameter	30.52″	31.56″	+1.04″ +3.42%
Section width	10.43″	10.43″	0.00″
Sidewall	6.26″	6.78″	+0.52″
Circumference	95.9″	99.2″	+3.3″
Revs per mile	661	639	−22
Axle height	15.26″	15.78″	+0.52″

When the odometer counts 1,000 miles, you have driven 1,034.2 miles.

Engine RPM at the same road speed: −3.3%. Gear ratio calculator

Speedometer

Speedometer reading and true speed
Dial shows	True speed	Difference
30 mph	31.0 mph	+1.0
45 mph	46.5 mph	+1.5
60 mph	62.1 mph	+2.1
70 mph	72.4 mph	+2.4
80 mph	82.7 mph	+2.7

265/60R18265/65R18

Note 1

P-metric or LT in the same size

Toyo Open Country A/T III is published in both versions.

Toyo Open Country A/T III, 265/60R18: P and LT
Toyo Open Country A/T III	P · 110T	LT · E · 119/116S
Overall diameter	30.50″	30.50″
Max load	2,337 lb @ 44 psi	3,000 lb @ 80 psi
Weight	38.0 lb	50.0 lb
Tread depth	13.3/32″	16.3/32″
Approved rims	7.5–9.5″	8.0–9.5″

Source: Toyo 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 265/60R18: 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 265/60R18

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

Sizes within 3% of 265/60R18
Size	Diameter	Width	vs 265/60R18	At 60 mph	Clearance
245/70R17	30.50″	9.6″	−0.1%	60.0	−0.01″
265/65R17	30.56″	10.4″	+0.1%	60.1	+0.02″
225/75R17	30.29″	8.9″	−0.8%	59.5	−0.12″
235/75R17	30.88″	9.3″	+1.2%	60.7	+0.18″
275/55R19	30.91″	10.8″	+1.3%	60.8	+0.19″
255/65R17	30.05″	10.0″	−1.5%	59.1	−0.23″
255/60R18	30.05″	10.0″	−1.5%	59.1	−0.24″
255/55R19	30.04″	10.0″	−1.6%	59.1	−0.24″
235/65R18	30.03″	9.3″	−1.6%	59.0	−0.25″
255/60R19	31.05″	10.0″	+1.7%	61.0	+0.26″

Other 18″ sizes

Q&A

Common questions

How tall is a 265/60R18 tire?

By the formula 265/60R18 measures 30.5 in (775 mm) overall diameter and 6.3 in (159 mm) sidewall height; revolutions are 661 per mile (411 per km).

How many makers publish 265/60R18?

Manufacturers list 17 tires from 5 brands in 265/60R18, including 4 LT and 13 P-metric or passenger versions; listed load ranges include SL, XL and E.

Will a different size change my speedometer?

Yes. Small diameter changes alter true speed; for example 265/65R17 shows about 60.1 mph when the speedometer indicates 60 mph and 245/70R17 shows 60.0 mph.

Where is tire pressure and load information recorded?

The vehicle tire and loading placard is on the driver’s side B-pillar (door jamb) and lists the manufacturer's recommended cold inflation pressures. 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.

Mickey Thompson: size table (mickeythompsontires.com)checked Oct 15, 2026
Toyo: size table (toyotires.com)checked Oct 15, 2026
Firestone: size table (firestonetire.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