How tall is a LT38x15.50R18 tire?

A LT38x15.50R18 has a nominal overall diameter of 38 inches (965 mm), calculated as the 18-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 LT38x15.50R18 tire fit?

A LT38x15.50R18 fits a wheel of 18 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 LT38x15.50R18 mean?

This is a flotation size, quoted in inches rather than millimetres. 38 is the overall diameter, 15.5 is the section width, R marks the construction (radial), and 18 is the wheel diameter.

Size Dimensions & Specs

Tires Size LT38x15.50R18

Dimensions, specs, and every size LT38x15.50R18 tire currently in stock

Overall Height

38"

965 mm · calculated

Section Width

15.5"

stated in inches

Sidewall Height

10"

254 mm

Wheel Diameter

18"

457.2 mm

LT38x15.50R18 Specifications

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

Specification	Imperial	Metric
Section width	15.5 in	—
Sidewall height	10 in	254 mm
Overall diameter (calculated)	38 in	965 mm
Wheel / rim diameter	18 in	457.2 mm
Construction	Radial	—
Service type	Light truck	—

What does LT38x15.50R18 mean?

Reading the code on your sidewall

Overall diameter

38 in

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

Section width

15.5 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

18 in

Fits a wheel measuring 18 inches across.

LT38x15.50R18 Questions & Answers

Dimensions and fitment guidelines for size LT38x15.50R18

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

245/45ZR20 ZEETEX SU1000 103Y XL 400-A-A 35K + ROAD HAZARD

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

P225/70R16 HANKOOK DYNAPRO HP RA23 OE 101T DSB 500-A-A 50K M+S HWY

LT265/70R16 LIONHART LIONCLAW ATX2 BLK 10PLY 40K+ ROAD HAZARD

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

235/50R19 COSMO ROAD HUNTER 99V M+S 560A-A 60K + ROAD HAZARD

265/70R16 ZETA CONSENSO H/T 112H 500A-A M+S 40K+ ROAD HAZARD

P235/70R16 LEXANI LXHT-206 107T 500-A-A 55K+ ROAD HAZARD

11R24.5 TRAVELSTAR TD660 CS DRIVE 149/146M 16PLY

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

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

275/55R20 TOYO PROXES ST III 117V XL BSW 500-A-A 40K

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

255/65R18 LANDSPIDER CITYTRAXX H/T 111H 480A-A 50K + ROAD HAZARD

LT285/70R17 LANVIGATOR VALIANT A/T 126/123R 10PLY 50K + ROAD HAZAR

205/40ZR17 ROYALBLACK RACINGTRAC 84W XL 420-A-A 50K + ROAD HAZARD

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

235/55R19 ARMSTRONG TRU-TRAC SU 105V XL M+S 440-A-A 65K+ ROAD HAZARD

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