The Rubbee’s polyurethane roller engages the rear tire, making a motor-only speed of 25 km/h possible on any bike and in any conditions. Check out their campaign on Kickstarter.
The Rubbee’s polyurethane roller engages the rear tire, making a motor-only speed of 25 km/h possible on any bike and in any conditions. Check out their campaign on Kickstarter.