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Michelin 22.5 Tire Specs

by Sarah McLeod

Common tire specifications include tire construction type, loaded ratios, size aspect ratios, manufacturer name, speed capacity, tire diameters, widths and weights. Michelin 22.5-inch tires are designed for use on recreational vehicles and motor homes. They are available under the Michelin tire model XRV. According to Michelin Truck's overview of the XRV, these tires have special features to facilitate drain water from the tires for better traction. In addition, sidewall characters are enlarged for easier reading.

Loaded Radius

Michelin 22.5 tires have loaded radii from 17.4 to 18.1 inches. The loading radius is the greatest distance from a wheel's axis to a supporting surface.

Tire Dimensions

Michelin 22.5 tires have widths ranging from 9.2 to 12.3 inches. The 12.3-inch width is the maximum width measured in a cross section of unloaded tire. These tires also have overall diameters without loading ranging from 37.1 to 39.1 inches. The smallest 22.5 Michelin tire, the 235/80R, weighs 78.9 lbs. The second largest tire, the 255/80R, weighs 89.5 lbs., and the largest of the three, the 305/70R, weighs 126.8 lbs.

Speed Capacity

Michelin 22.5 tires can operate safely at speeds up to 75 mph.

Approved Rims

Manufacturer approved rim sizes for the Michelin 22.5 tires are 6.75, 7.50, 8.25 and 9.0. Specifically, the Michelin 235/80R 22.5 may be fitted on 6.75 and 7.50 inch rims. The Michelin 255/80R 22.5 may be fitted on 7.50-inch and 8.25-inch rims. The Michelin 305/70R 22.5 may be fitted onto 8.25-inch and 9.0-inch rims.

Aspect Ratios

Michelin 22.5 tires have varying aspect ratios. They come in 235/80R, 255/80R and 305/70R ratios. The first numbers, 235, 255 and 305, represent the widths of the different 22.5 tires in millimeters and the second set of numbers, 80 and 70, represent the height. According to Coast Tire and Auto Service, aspect ratios are common sidewall indicators.

Revolutions per Minute

The Michelin 22.5 tire creates a different number of revolutions per minute (rpm) over the course of a mile, depending on the tire size. The 235/80R 22.5 tire revolves 556 times over the course of 1 mile. The 255/80R 22.5 tire has an rpm of 541 per mile and the 305/70R 22.5 has a 531 rpm.

Tread Depth

The depth of tread on all of the Michelin 22.5 tires is 16/32 of an inch.

About the Author

Sarah McLeod began writing professionally for the federal government In 1999. In 2002 she was trained by Georgetown University's Oncology Chief to abstract medical records and has since contributed to Phase I through Phase IV research around the country. McLeod holds a Bachelor of Arts in human services from George Washington University and a Master of Science in health science from Touro University.

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