9mm Small rubber wheel with 1.5mm shaft hole. Ideal for solarollers!
9mm OD, 1.5mm ID, 7mm wide. The same as used in our SolarSpeeder kit. Ideal for you do-it-yourself Solaroller builders who plan on entering competition.
Don't forget to order PRet plastic retainers if you're planning on using these on standard 0.055" diameter music wire shafts!