CDHPOWER Bicycle Gas Frame 3.4L For 2-Stroke & 4-Stroke Engines. Requirement on switch of gas frame: 10*1.5mm rear width:126mm
Requirement on headset size:1 1/8"; bottom bracket 1.732" /44mm diameter;Requirement on seatpost:27.2mm; the width and Inner Diameter(including depth of screw) of the bottom bracket:68mmx35.4mm/2.677inx1.3937in
Gas Tank Cap included; For gas motorized bicycle only
Diameter of downtube:42mm; Requirement on seatpost:27.2mm
PLEASE NOTE 1: the best safe speed if racing: 35km/h If buyers' bike rear wheel is with quick release,we suggest buyers do not buy the gas frame unless buyers are professional. Any questions,please contact us firstly! we can help you solve the problem until you are satisfied.