What is the diameter of a 400-8 tire?

1 Answers
LaBrody
07/30/25 6:27am
400-8 is an industrial tire with an outer diameter of 415mm and a section width of 112mm. The number 400 represents the nominal section width code of the tire, and 8 represents the nominal rim diameter code, both measured in inches. 1 inch equals 25.4 millimeters. The diameter of the wheel rim generally ranges between 15-22 inches, which is 381-558.8 millimeters, while the width of the tire typically ranges between 165-225 millimeters. Multiplying by the aspect ratio of 0.45-0.70, the general tire width is approximately between 110-115 millimeters. Based on these calculations, the diameter of an automotive tire generally falls within the range of 60-80 centimeters.
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