305/30R21 in Inches

305/30R21 tire size conversion to inches with detailed visualization of tire height, width, diameter, rim size and more.

What is 305/30R21 in inches?

When we convert 305/30R21 to inches, it is equivalent to 28.2x12R21. Let us break down the tire size dimensions for better understanding. 12 inches or 305 mm stand for section width, or width of the tire tread. 28.2 inches or 717 mm represent the overall diameter of the tire, or tire height. 21 inches is the rim diameter, or the diameter of the wheel the tire can be mounted on.

305/30R21 Section Width
305/30R21 Tire Side
Tire Circumference
716 Revs/Mile
Metric Inches
Overall Diameter 717 mm 28.2"
Tread Width 305 mm 12"
Rim Diameter 533 mm 21"
Sidewall Height 92 mm 3.6"
Circumference 2251 mm 88.5"
Revolutions 444 per km 716 per mile
Best Prices on 305/30R21 Tires
TireRack from $204.91
Priority Tire from $351.99
Simple Tire from $388.99

What is 305/30R21 tire width?

305/30R21 tire has a width of 12 inches or 305 mm that reflects the measurement of tire's width from its inner sidewall to its outer sidewall at the widest point (excluding decorations, protective ribs or raised letters). Tire width is also called tread width, section width or cross section width. Tire width should be measured without any load placed upon the tire after it has been properly inflated and mounted on its industry assigned measuring rim.

What is 305/30R21 tire height?

305/30R21 tire has an overall diameter of 28.2 inches or 717 mm that represents the outer diameter of the tire or tire height.

What is 305/30R21 tire sidewall height?

305/30R21 tire has a sidewall height of 3.6 inches or 92 mm which is the measurement of tire sidewall from the wheel rim to the top of tire tread. Tire sidewall height or "profile" depends on aspect ratio - lower aspect ratio means lower tire profile.

What is 305/30R21 rim diameter?

Rim or wheel diameter is generally measured in inches, representing the size of the wheel the tire can be mounted on. 305/30R21 tire can be mounted on 21 inch wheels.

What is 305/30R21 tire circumference?

305/30R21 tire has a circumference of 88.5 inches or 2251 mm that represents the outer perimeter of the tire.

How many revolutions 305/30R21 tire makes?

Tire revolutions indicate the number of times a tire revolves while it covers the distance of a mile or a kilometer. 305/30R21 tire completes 716 revolutions per mile or 444 revolutions per kilometer.

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