Trikke Tube, 70 degree Angled Valve, Kenda. Trikke, Zike, Wing Flyer Replacement Inner Tube. 2 Tubes - 12-1/2" x 2-1/4" 70 Degree angled valve for EASY inflation Replacement inner tube for a Trikke, Zike, Wing Flyer, Stroller, Scooter or other bike with the same tire size.