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305/70R18 Sizing Info

305/70R18
Diameter: 34.81 inches
Sidewall Height: 8.41 inches
Radius: 17.41 inches
Rim Diameter: 18.00 inches
Section Width: 12.01 inches
Circumference: 109.36 inches
Rev/Mile: 579.36
Rim Width Range: 9″, 9.5″, 10″, 10.5″, 11″
List of 305/70R18 Sized Tires

All of the tires listed below will fit the size you are looking for. 

BFGoodrich All-Terrain T/A KO2
  • Rating: 4.40 / 5
  • Truck/SUV Off-Road
Get Free Shipping!
Cooper Discoverer S/T Maxx
  • Rating: 4.20 / 5
  • Truck/SUV Off-Road
Get Free Shipping!

Tire Size 305/70R18 in inches

Below are the most common tire sizing information in inches:

305/70R18 Height - How tall is a 305/70R18 tire in inches?

This tire size is 34.811 inches tall.

305/70R18 Width in inches - How wide is a 305/70R18 tire?

This tire size is 12.008 inches wide (tread width).

What's the Sidewall Size of a 305/70R18 Tire in Inches?

This tire size has 8.406 inch sidewalls.

Other Questions About the 305/70R18 Tire Size

Here's some other common questions asked about this tire size:

What size rims fit a 305/70R18 tire?

This tire will fit onto 18 inch wheels.

What is the next size up from 305/70R18?

The tire sizes below are the next sizes up from 305/70R18. The table shows the increase in diameter and width for each option.

Tire SizeDiameter (in)Width (in)Diameter ChangeWidth Change
35x12.5R1835.00012.500+ 0.189 in+ 0.492 in
315/70R1835.36212.402+ 0.551 in+ 0.394 in
37x12.5R1837.00012.500+ 2.189 in+ 0.492 in
37x13.5R1837.00013.500+ 2.189 in+ 1.492 in
38x13.5R1838.00013.500+ 3.189 in+ 1.492 in

What is the next size down from 305/70R18?

The tire sizes below are the next sizes down from 305/70R18. The table shows the decrease in diameter and width for each option.

Tire SizeDiameter (in)Width (in)Diameter ChangeWidth Change
295/70R1834.26011.614- 0.551 in- 0.394 in
34x7.5R1834.0007.500- 0.811 in- 4.508 in
285/70R1833.70911.220- 1.102 in- 0.787 in
275/70R1833.15710.827- 1.654 in- 1.181 in
295/65R1833.09811.614- 1.713 in- 0.394 in

What does the 305 mean in tire size?

This represents the treadwidth of the tire. The tread is 305mm wide, or 34.811 inches wide.

What does the 70 mean in tire size?

This represents the sidewall height of the tire, as a percentage of the width. The sidewall height is 70% of 305mm, or 213.5mm, which is 8.406 inches.

What does the 18 mean in tire size?

This represents the wheel diameter that this tire size fits on. This tire size is meant to fit an 18 inch wheel.



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