GHP 2014 Avery Andrews Archish Chaturvedi Nandan Dave

 The concept of the hubless wheel (A.K.A. centreless wheel) is a wheel with no center.  The hubless wheel was invented by Franco Sbarro. Franco Sbarro Hubless Bike

Motorcycles Ferris Wheels Rovers

 12.5 mm thick ABS plastic  23.6 mm diameter motor slot to fit a 24.2 mm motor (tight slot keeps motor in place)  Adjustable clamp with 3 mm slack

 98 mm inner diameter  136 mm outer diameter  1:11 torque ratio  Six 4 mm screw holes for 3/32 screws

 98 mm length  50 mm wide  Eight 4 mm screw holes for 3/32 screws  36 mm distance between each set of four screw holes for the two motor mounts

 86 mm inner diameter  98 mm outer diameter  Six 4 mm screw holes for 3/32 screws