How tall is a 31x12.50R20LT tire?

A 31x12.50R20LT has a nominal overall diameter of 31 inches (787 mm), calculated as the 20-inch wheel plus two sidewalls. This is the unloaded figure — a fitted tire sits fractionally shorter under the weight of the vehicle.

What wheel size does a 31x12.50R20LT tire fit?

A 31x12.50R20LT fits a wheel of 20 inches in diameter. The wheel also has to be within the rim width range the manufacturer publishes for this size, which is printed in the tire's spec sheet.

What do the numbers in 31x12.50R20LT mean?

This is a flotation size, quoted in inches rather than millimetres. 31 is the overall diameter, 12.5 is the section width, R marks the construction (radial), and 20 is the wheel diameter.

Size Dimensions & Specs

Tires Size 31x12.50R20LT

Dimensions, specs, and every size 31x12.50R20LT tire currently in stock

Overall Height

31"

787 mm · calculated

Section Width

12.5"

stated in inches

Sidewall Height

5.5"

140 mm

Wheel Diameter

20"

508.0 mm

31x12.50R20LT Specifications

Read directly from the size code. Load index, speed rating, and rim width range vary by model.

Specification	Imperial	Metric
Section width	12.5 in	—
Sidewall height	5.5 in	140 mm
Overall diameter (calculated)	31 in	787 mm
Wheel / rim diameter	20 in	508.0 mm
Construction	Radial	—

What does 31x12.50R20LT mean?

Reading the code on your sidewall

Overall diameter

31 in

Flotation sizes lead with the tire's full height in inches rather than a width in millimetres.

Section width

12.5 in

The width across the widest point of the tire, also quoted in inches on this style of size.

Construction (R)

Radial

The body plies run across the tire at right angles to the direction of travel.

Wheel diameter

20 in

Fits a wheel measuring 20 inches across.

31x12.50R20LT Questions & Answers

Dimensions and fitment guidelines for size 31x12.50R20LT

Customer Support & Fitment Advice

Need Help Choosing The Right Tires?

Have questions about fitment, brands, or pricing? Our team of tire experts is here to guide you to the perfect set — zero pressure, zero sales tactics.

100% Guaranteed Fitment Advice

Talk to a Tire Specialist Today

We make tire buying fast and effortless. Call or email us anytime to verify size compatibility, load index, or speed ratings for your vehicle.

Call Direct

(916) 520-1702

Send Email

info@natireshub.com

Mon - Fri: 8:00 AM - 5:00 PM PST

✓

Fast Expert Advice

Response within 1 business hour

Live Inventory

Shop Our Collection

Explore premium tires, wheels, and fitments from top brands

LT275/55R20 FORTUNE TORMENTA R/T FSR309 120/117Q 10PLY M+S 50K 80psi *NEW

LT295/55R20 FORTUNE TORMENTA R/T 123/120Q 10PLY M+S 50K 80psi ***BUFFED

LT285/75R16 CROSSWIND RUGGED TRAXX R/T 126/123Q 10PLY 80psi 50K

145/70R13 ARMSTRONG BLU-TRAC PC 71T 700-A-A 85K+ ROAD HAZARD

215/60VR16 GOODYEAR EFFICIENTGRIP PERFORMANCE 95V

205/50ZR17 FULLRUN F6000 93W XL M+S 380A-A

245/45ZR19 ATLANDER XSPORT-86 102W XL 420A-A 50K + ROAD HAZARD

LT265/70R16 LEXANI TERRAIN BEAST A/T 121/118S 10PLY 50K+ROAD HAZARD

265/70R16 TRAVELSTAR ECOPATH A/T 112T 520-A-B 50K+ ROAD HAZARD

ST205/75R15 SYNERGY ST801 10PLY

7.50-16 AKURET HARROW TRACK F2 F3 8PLY dot-2012

265/70R16 COSMO EL TIGRE A/T 112T BSW M+S 540A-B 55K+ ROAD HAZARD

P255/55R18 LEXANI QUATTRO TEMPO TOUR AW 109V BLK 600A-A 70K+ ROAD HAZARD

305/25R32 LEXANI LX-THIRTY 108W XL 320-A-A 30K + ROAD HAZARD dot-1120

LT265/70R16 ATLANDER ROVERCLAW A/T 121/118S 10PLY

255/40ZR18 ROADTRACK TERRENA UHP 99W XL 420-A-A 50K + ROAD HAZARD

225/35R19 ARMSTRONG BLU-TRAC HP 88W XL M+S 340A-A 45K+ ROAD HAZARD

245/45ZR20 ATLANDER XSPORT-86 103W XL 420A-A 45K + ROAD HAZARD

LT235/85R16 ATLANDER ROVERCLAW M/T I 120/116Q 10PLY

P215/55R17 LIONHART RAMANI A/S 98W XL BLK 500A-A 50K + ROAD HAZARD