375/45R20 In Inches – Tire Size & Wheel Fitment Guide

What tire size is 375/45R20 in Inches?

The 375/45R20 tire has an overall diameter of 33.3 inches, a section width of 14.8 inches, and can be mounted on 20 inches height of rim. The equivalent tire size in the high flotation system is 33.3x14.8R20.

	Inches	Millimeters
Tire Diameter	33.3	845.5
Section Width	14.8	375
Rim Height	20	508
Sidewall Height	6.6	168.8
Circumference	104.6	2656.2

14.8"

33.3"

104.6"

20"

6.6"

605.9 Revs/Mile

To make it clear, we'll break down each part of the 375/45R20 tire size to know what these numbers represent & how they may affect your tire's performance:

How big is a 375/45R20 tire?

A 375/45R20 tire has a height of 33.3 inches (845.5 mm). This is the measurement from the bottom to the highest point at the top of a tire through its exact center when inflated and unloaded.

How wide is a 375/45R20 tire?

The 375/45R20 tire has a width of 14.8 inches (375 mm). This is the measurement at its thickest point, the distance between the outer sidewall and the inner sidewall’s widest point, also called as tread width or section width.

You can put a slightly narrower or wider tire on a rim as long as it falls within the manufacturer's recommended tire width range.

375/45R20 sidewall height

The 375/45R20 has a sidewall height of 6.6 inches (168.8 mm). It’s measured from the rim to the outer edge of the tire's tread, expressed as a percentage of tire width.

What size rim do I need for 375/45R20 tire?

You can mount the 375/45R20 tire on a rim with a height of 20 inches.

Putting very narrow tires on wide rims or vice versa can result in reduced performance of the tire.

375/45R20 circumference

The 375/45R20 tire has a circumference of 104.6 inches (2656.2 mm), This is the measurement of the distance the tire travels in one revolution.

The tire circumference is important for your vehicle's overall performance, affecting its speedometer acceleration, accuracy and fuel efficiency.

375/45R20 Revolutions

The 375/45R20 performs 605.9 revs/mile. Revolutions per mile indicate the number of times a tire rotates while it covers the distance of one mile.

Compatible Tire Sizes for 375/45R20

As a rule, you can replace the tire within a 3% difference in tire diameter (height) of the OEM tire size. However, it should be considered as a general guideline, not a hard and fast rule. Here is a list of compatible tire sizes for 375/45R20: