Rear Disc brake bracket and front mount pedestal works well with gas motor front mount bolts 8mm；
rear width:135mm;
the width and Inner Diameter of the bottom bracket:68mmx50.8mm/2.677inx2in
Gas Frame 2.4L Requirement on seatpost:27.2mm, Note: buyers need know how to fasten the motor on the pedestal mount of gas frame to prevent crack from vibration which maybe caused crack of frame; Bicycle gas frame Built-in 2.4L gas tank Designed for the 2-cycle engines 48cc/66cc/80cc with 40 to 50mm wide front mount stud spacing
Bottom bracket: 51.5mm (inner diameter)&60mm (outer diameter)
Required for seat post:27.2mm
Required for seat post clamp:31.8mm
requirement on headset size:1 1/8"; bottom bracket 2" diameter;
Requirement on switch of gas frame: 10*1.0mm
One Piece Crank 2'' Cup Wide Pedal Crank Kit, Length of Arm:152mm/5.98 inch,compatible with 1/2 inch pedals; The distance between the pedal crank arms is about 185mm/7.283inch