Bicycle Wheel Size Calculator. Unlike adult bike sizing done by frame children s bike size is done based on wheel diameter. Also take a look at our complete bicycle gear ratio chart below to see how your size compares to other gearing options.
This guide is accurate and is updated on a daily basis. The deciding factor for the size of a bicycle is the frame in particular the seat post the distance from the center of the bottom bracket to the top of the seat post. The tables below show the frame size that best suits your height.
Alternatively skip ahead and use the bike size calculator to find the right size and type of bike for you.
Generic wheel size calculator to compute bicycle tire circumference for your bike computer value to enter if you want to see mph on sigma units without auto conversion. If you know their numbers just input them below and we ll calculate it automatically for you. Most bicycle computer instruction manuals only list wheel size input numbers for 16 and larger wheels however bicycle computers can be used with wheels smaller than 16 if the correct wheel size is programmed into the computer using the calculator above. Due to women generally having shorter upper bodies than men along with shorter top tubes on bikes women s bikes are made slightly different.