Bike Tyre Size Calculator

Enter your own info above and then press the button.

Bike tyre size calculator.

Tyres of the same size may come with lots of different markings. 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. I ll calculate the best chainring cog combinations and. 28 1 15 8 28 1 1 or 700 32c which are all 32 622.

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. Although they re familiar they can be very confusing. Most lists the tire size both english french and german targets and rim circumference in millimeters. 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.

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