OQSPORT Folding Bicycle Auxiliary Wheel Booster Wheel(Black)

Features
1. Brand new and high quality.
2. Item description: Folding bikes wheel roller / booster wheels
3. Description: When you take the public transportation (green travel) in and out of the subway, train station or bus, you should fold up your bike and carry it by hand, otherwise it is forbidden to enter. With this kind of wheels, heavy bike embarrassed you don't have to hand up and down, tired, after folding the bike this wheels still can help you, make you travel, try to ease!
4. Features: suitable to most of folding bikes! Quick release and fast loading without tools.
5. Small and portable.
6. Inner diameter: about 32-33mm.

Installation Method
1. Put it on the seatpost directly.
2. If it is too tight, please loosen the clamp to appropriate manually.
3. If it is too loose, please cushion some gasket to fit the seatpost.