255/30R21 Tire Size in Inches

255/30R21 is a metric tire size representation, which defines that the tires have a width of 255 mm, 30 is the aspect ratio and a rim diameter of 21 inches. In the imperial system the tire size 255/30R21 equates to a 27×10R21 that is commonly used in the automotive industry. So Converting 255/30R21 in inches the tires have a length of 27 inches, a width of 10 inches, a sidewall height of 3 inches and The number of complete resolutions made by the corresponding tire size is equal to 747 per mile with a circumference of 84.8 inches.

255/30R21 tire size in inches

255/30R21inchesmm
Tire Diameter27 inches687 mm
Tread Width10 inches255 mm
Rim Diameter21 inches533 mm
Sidewall Height3 inches77 mm
Circumference84.8 inches2157 mm
Revolutions747 per mile464 per km

Tire Size Calculator

Tire Diameter
Tread Width
Rim Diameter
Sidewall Height
Circumference
Revolutions

255/30R21 Equivalent Tire Sizes for replacement

If you are replacing your tires, always keep in mind that they are compatible with your vehicle so that the impact on the overall performance of your vehicle can be reduced. Here we have listed some tire size that is equivalent to 255/30R21 tires.

Tire Size Overall Diameter Difference
275/25R21 26.4″ (671 mm) -2.3%
235/30R21 26.6″ (675 mm) -1.7%
295/25R21 26.8″ (681 mm) -0.9%
245/30R21 26.8″ (681 mm) -0.9%
375/20R21 26.9″ (683 mm) -0.6%
305/25R21 27″ (685 mm) -0.3%
265/25R22 27.2″ (691 mm) 0.6%
265/30R21 27.3″ (693 mm) 0.9%
225/30R22 27.4″ (695 mm) 1.2%
325/25R21 27.4″ (695 mm) 1.2%
235/35R21 27.4″ (697 mm) 1.5%
275/25R22 27.4″ (697 mm) 1.5%
275/30R21 27.5″ (699 mm) 1.7%
235/30R22 27.6″ (701 mm) 2%
285/25R22 27.6″ (701 mm) 2%
285/30R21 27.8″ (705 mm) 2.6%
245/35R21 27.8″ (705 mm) 2.6%
295/25R22 27.8″ (707 mm) 2.9%
245/30R22 27.8″ (707 mm) 2.9%

Leave a Comment