Bike Tyre Size Calculator

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.

Bike tyre size calculator.

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 is how we would refer to a 700 x 28c tire has a tire width of 28 mm and a rim diameter of 622 mm. This means that you can easily find the right tire size although it is a danish number. I ll calculate the best chainring cog combinations and. 28 1 15 8 28 1 1 or 700 32c which are all 32 622.

Sometimes you can t find any iso size on a tyre only the old school markings. Most lists the tire size both english french and german targets and rim circumference in millimeters. Tyres of the same size may come with lots of different markings. The venerable sheldon brown has a gear calculator that uses a different method to determine wheel size.

Enter your own info above and then press the button. 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. Although they re familiar they can be very confusing.