What size do I need ?

Measure the diameter of your rear wheel inside the push rims (excluding them from the measurement), and going through the center of the wheel. 
If you are using push rim covers, we highly recommend taking them off to measure, as their thickness might lead to an inaccurate measurement.

In both examples below, the size is 19 5/8".

If you need any help, chat with us or send us an email at hello@iwheel.us !