How to Measure Tires & Rims

Learn how to measure different types of tires and rims with the charts below. Maintain and repair tires with Gemplers' selection of tire supplies ranging from air gauges & chucks, flat tire prevention supplies, tire changing tools, and much more.

Tire Sizes Outside Diameter x Width x Rim Diameter For Example: 18 x 8.50 - 8 A: 18" - Height of the tire; overall diameter B: 8.5" - Width of the tire from sidewall to sidewall C: 8" - Diameter of rim	Industrial Tire & Wheel Assemblies Example: 4.80 x 8 Wheelbarrow tire assembly OD: 16" Hub Length: 6" Axle Shaft: 5/8"
Wheel Offset Positive Offset: A wheel with a positive offset moves the tire and wheel closer to the frame.	Rim Diameter & Width Diameter: Rim diameter is measured from tire bead seat area to tire bead seat area Width: Rim width is measured from tire bead seat area to tire beat seat area
ATV Tires Example size: 20 x 7 - 8 A: 20" Height of tire overall diameter B: 7" - Width of tire from sidewall to sidewall C: 8" - Diameter of rim	Agricultural Wheels Correct Way to Measure the Bolt Pattern of a 5 Bolt Wheel: Measure from center on one bolt hole straight across the wheel to the center of the two opposite bolt holes

‍