|Tire Size||Diameter||Rim (H x W)|
|375/60R18||35.7″ (+2.5%)||18″ x n/a|
|315/70R18||35.4″ (+1.7%)||18″ x 8.0-11.0″|
|325/60R20||35.4″ (+1.7%)||20″ x 9.0-10.0″|
|275/80R18||35.3″ (+1.4%)||18″ x n/a|
|295/65R20||35.1″ (+0.9%)||20″ x 8.0-10.0″|
|325/70R17||34.9″ (+0.3%)||17″ x 8.5-10.0″|
|315/60R20||34.9″ (+0.3%)||20″ x 8.5-11.0″|
|285/75R18||34.8″ (Equal)||18″ x 7.5-9.5″|
|325/65R18||34.6″ (-0.6%)||18″ x 9.0-10.0″|
|285/65R20||34.6″ (-0.6%)||20″ x 8.0-10.0″|
|335/55R20||34.5″ (-0.9%)||20″ x n/a|
|295/75R17||34.4″ (-1.2%)||17″ x n/a|
|315/70R17||34.4″ (-1.2%)||17″ x 8.0-10.5″|
|305/60R20||34.4″ (-1.2%)||20″ x 8.5-11.0″|
|275/80R17||34.3″ (-1.5%)||17″ x n/a|
|295/70R18||34.3″ (-1.5%)||18″ x 7.0-10.0″|
|345/60R18||34.3″ (-1.5%)||18″ x n/a|
|275/65R20||34.1″ (-2.1%)||20″ x 7.0-9.5″|
|265/70R19.5||34.1″ (-2.1%)||19.5″ x n/a|
|355/50R20||34″ (-2.4%)||20″ x 10.0-11.5″|
|295/60R20||33.9″ (-2.7%)||20″ x 8.0-10.0″|
|285/75R17||33.8″ (-3%)||17″ x 7.5-9.5″|
|305/70R17||33.8″ (-3%)||17″ x 8.0-9.5″|
305/70R18 In Inches – Tire Size & Rim Fitment Guide
What size tire is 305/70R18 in Inches?
The 305/70R18 tire has an overall diameter of 34.8 inches, a section width of 12 inches, and can be mounted on 18 x 8.5-10.0 inches rim. The equivalent tire size in the high flotation system is 34.8x12R18.
To easy understanding, let us break down each component of the 305/70R18 tire size to know what these numbers represent and how they may affect your vehicle's performance:
How tall is a 305/70R18 tire?
A 305/70R18 tire has a height of 34.8 inches (884.2 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 no load.
How wide is a 305/70R18 tire?
The 305/70R18 has a width of 12 inches (305 mm). This is the tire measurement at its thickest point, the distance between the inner sidewall’s and the outer sidewall’s widest point, also known as section width or tread width.
305/70R18 sidewall height
The sidewall height of a 305/70R18 is 8.4 inches (213.5 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 305/70R18 tire?
You can put on a rim with a height of 18 inches and a rim width ranging from 8.5-10.0 inches for a 305/70R18 tire. (Based on recommendations of The Tire and Rim Association (TRA))
Putting very wide tires on narrow rims or vice versa can result in reduced performance of the tire.
The 305/70R18 tire has a circumference of 109.4 inches (2777.8 mm), This is the measurement of the distance the tire covers in one full rotation.
The tire circumference plays a crucial role in your vehicle's overall performance, affecting its speedometer accuracy, acceleration and fuel efficiency.
The 305/70R18 performs 579.4 revs/mile. Revolutions per mile indicate the number of times a tire rotates while it covers the distance of one mile.
Alternative Tire Sizes for 305/70R18
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 305/70R18:
More tire sizes for 18" Wheel:
25″ Tire Diameter
- 135/70R18 = 25.5x5.3R18
- 145/65R18 = 25.4x5.7R18
- 155/60R18 = 25.3x6.1R18
- 205/45R18 = 25.2x8.1R18
- 215/45R18 = 25.6x8.5R18
- 225/40R18 = 25.1x8.9R18
- 235/40R18 = 25.4x9.3R18
- 245/40R18 = 25.7x9.6R18
- 255/35R18 = 25x10R18
- 265/35R18 = 25.3x10.4R18
- 275/35R18 = 25.6x10.8R18
- 285/35R18 = 25.9x11.2R18
- 295/30R18 = 25x11.6R18
- 305/30R18 = 25.2x12R18
- 315/30R18 = 25.5x12.4R18
- 335/30R18 = 25.9x13.2R18
26″ Tire Diameter
- 135/80R18 = 26.5x5.3R18
- 145/70R18 = 26x5.7R18
- 155/70R18 = 26.6x6.1R18
- 185/55R18 = 26x7.3R18
- 205/50R18 = 26.1x8.1R18
- 205/55R18 = 26.9x8.1R18
- 215/50R18 = 26.5x8.5R18
- 225/45R18 = 25.9x8.9R18
- 225/50R18 = 26.9x8.9R18
- 235/45R18 = 26.3x9.3R18
- 245/45R18 = 26.7x9.6R18
- 255/40R18 = 26x10R18
- 275/40R18 = 26.7x10.8R18
- 295/35R18 = 26.1x11.6R18
- 305/35R18 = 26.4x12R18
- 315/35R18 = 26.7x12.4R18
- 345/30R18 = 26.2x13.6R18
27″ Tire Diameter
- 145/80R18 = 27.1x5.7R18
- 145/85R18 = 27.7x5.7R18
- 155/80R18 = 27.8x6.1R18
- 165/70R18 = 27.1x6.5R18
- 205/60R18 = 27.7x8.1R18
- 215/55R18 = 27.3x8.5R18
- 225/55R18 = 27.8x8.9R18
- 235/50R18 = 27.3x9.3R18
- 245/50R18 = 27.7x9.6R18
- 255/45R18 = 27x10R18
- 265/45R18 = 27.4x10.4R18
- 275/45R18 = 27.8x10.8R18
- 285/40R18 = 27x11.2R18
- 295/40R18 = 27.3x11.6R18
- 305/40R18 = 27.6x12R18
- 315/40R18 = 27.9x12.4R18
- 325/35R18 = 27x12.8R18
- 335/35R18 = 27.2x13.2R18
- 345/35R18 = 27.5x13.6R18
*Disclaimer: The tire size is for information purposes only, the measurement is an approximation, as tire manufacturers can have slight variations in their measurements. It's recommended to refer to the vehicle manufacturer's guidelines or consult with a tire mechanic to determine the correct tire size for your vehicle.