Tire Size Cross Referencing Chart

If you have an older classic car, you may know the car’s original tire size but not how to cross reference it to a modern tire size or maybe you know the diameter of the tire you want. I’ve prepared a table here for you to use as a quick reference. Notice that as you read across, each line represents the same basic tire size, all the way from left to right.

Tire Size Conversion Chart
1950’s
1960’s
Average
Height
1970’s
Average
Height
Modern Radial
Average
Height
750-14
775-14
26.8"
F78-14
26.5"
205-75R14
26.1"
800-14
825-14
27.4"
G78-14
27.2"
215-75R14
26.7"
640-15
735-15
26.5"
E78-15
26.3"
185-80R15
26.7"
670-15
775-15
27.5"
F78-15
27.4"
205-75R15
27"
710-15
815-15
28"
G78-15
27.8"
215-75R15
27.6"
760-15
845-15
28.6"
H78-15
28.3"
225-75R15
28"
800-15
900-15
29.5"
L78-15
29.3"
235-75R15
29"

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