How tall is a 31x13.50R20LT tire?

A 31x13.50R20LT 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 31x13.50R20LT tire fit?

A 31x13.50R20LT 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 31x13.50R20LT mean?

This is a flotation size, quoted in inches rather than millimetres. 31 is the overall diameter, 13.5 is the section width, R marks the construction (radial), and 20 is the wheel diameter.

Size Dimensions & Specs

Tires Size 31x13.50R20LT

Dimensions, specs, and every size 31x13.50R20LT tire currently in stock

Overall Height

31"

787 mm · calculated

Section Width

13.5"

stated in inches

Sidewall Height

5.5"

140 mm

Wheel Diameter

20"

508.0 mm

31x13.50R20LT Specifications

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

Specification	Imperial	Metric
Section width	13.5 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 31x13.50R20LT 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

13.5 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.

31x13.50R20LT Questions & Answers

Dimensions and fitment guidelines for size 31x13.50R20LT

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

215/60VR16 GOODYEAR EFFICIENTGRIP PERFORMANCE 95V

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

33X12.50R20LT ATLANDER ROVERCLAW M/T I 119Q ***12PLY

235/45R17 TOYO EXTENSA HP II 97W XL 500-A-A 45K

225/55R17 ZENNA SPORT LINE 101V XL M+S 420-A-A 60K + ROAD HAZARD

ST235/85R16 FORTUNE ST01 125/121M 10PLY 80psi 3640/3200

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

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

235/55ZR19 ROADTRACK TERRENA UHP 105W M+S 420-A-A 50K + ROAD HAZARD

225/55ZR18 MOHAWK AEGIS SPORT A/S 102W XL M+S 500-A-A 50K + ROAD HAZARD

LT275/65R20 PEGASUS RTX R/T 126/123R 10PLY 40K+ ROAD HAZARD

315/35ZR20 PEGASUS HPX SPORT A/S 110W XL 420 AA A 50K + ROAD HAZARD

LT235/70R17 RBP REPULSOR A/T PLATEAU 120/117R 10PLY BLK 50K + ROAD HAZARD

LT295/65R20 GLADIATOR X COMP M/T 129/126 10PLY

215/60R17 ROYALBLACK MILAGEMAX SUV/CUV 96V 620-A-A 60K + ROAD HAZARD

35X13.50R24LT ROADTRACK TERRENA M/T 116Q 12PLY

35X12.50R18LT ATLANDER ROVERCLAW M/T I 123Q 10PLY

LT245/75R16 ARMSTRONG TRU-TRAC A/T 120/116S 10PLY 65K+ROAD HAZARD

215/55R16 ROADTRACK TERRENA UHP 97V M+S 420-A-A 50K + ROAD HAZARD

LT265/70R17 ROADCRUZA RA3200 M/T 121/118Q 10PLY