Rear tire width calculator for the 55-57 Chevrolet

To help you pick the right size tires, wheels and rear end combination for your classic

This calculator is based on chevynut's spreadsheet from Chevy Talk 1955-1957 ( Modified / pro street / show) forum. If you have a classic chevrolet I would highly recommend Chevy Talk for all makes of classic Chevy's or for 55-57 Chevy's. There is a lot of knowledgeable people there to help you with your Chevy project.

Numbers must be entered as decimals, example 71 1/4" would be entered as 71.25

Rear Quarter inner lip width Measure at the top of the quarters inside to inside 71 ~ 72" is the stock measurement

Quick pick for wheel mounting surface width Pick a rear end

Rear wheel mounting surface width Measure with disc/drum in place Approximately 60 " is the stock measurement

Quick pick for your spring/wheel well set up Or enter the measurement below

The distance across the left and right spring, wheel well or frame measure what ever is closest to the tire


Enter tire and wheel information

Metric Tire size Tire diameter doesn't really matter

Tire width in inches

Wheel width 15" x 7" wheel width would be 7",diameter doesn't really matter

Wheel back space must be a decimal 4 1/4" would be 4.25

Tire clearance

Inside tire clearance

Always double check with tires on car

I appreciate any input, if you see any mistakes or any thing you would like to see added please let me know.
Any comments or suggestions please email me