Made by Cheng Shin one of the most trusted brands in tyres, and the largest manufacturer of bicycle tyres in the world. This tyre is grey non marking and suitable for a powered wheelchair. Powered wheelchair tyre powerchair tyre enigma tyre 12 1/2 x 2 1/4 – TG12C628 .. 12.5×2.25 grey tyres, 12.5×2-1/4 tyres