Bike Tyre Size Calculator

Sometimes you can t find any iso size on a tyre only the old school markings.

Bike tyre size calculator.

Most lists the tire size both english french and german targets and rim circumference in millimeters. I ll calculate the best chainring cog combinations and skid patches for your speed and cadence and what your speed will be at various cadences. If you are unsure of your bicycle tire size you can look into a bicycle tire table where you can easily and simply find just the tires that fit your bike. The venerable sheldon brown has a gear calculator that uses a different method to determine wheel size.

His calculator uses an pre defined diameter for every rim tire combination and his diameters are almost always different than what the math would predict. 28 1 15 8 28 1 1 or 700 32c which are all 32 622. Although they re familiar they can be very confusing. I ll calculate the best chainring cog combinations and.

This means that you can easily find the right tire size although it is a danish number. The calculator above is based on the iso etrto european tyre and rim technical organization tire size which specifies tire size as a tire width and rim circumference in mm. A iso tire size of 28 622 which of course is backwards b c it s european from how we would refer to a 700 x 28c tire has a tire width of 28 mm and a rim diameter of.