Package include: 1pc 3.4L frame (Brushed Alum), 2pcs Petcocks Please clean the black color painting on thread of bottom bracket before you assemble the crankset. Note: If buyers' bike rear wheel is with quick release,we suggest buyers do not buy the gas frame unless buyers are professional For 2-Stroke & 4-Stroke Engines. Requirement on headset size:1 1/8"; Bottom bracket 1.732" /44mm out diameter; The width and Inner Diameter(including depth of screw) of the bottom bracket: 68mmx35.4mm/2.677inx1.3937in Gas Tank Cap included; Kickstand Excluded Rear Width: 126mm Diameter of downtube:42mm Requirement on switch of gas frame: 10*1.5mm Required for seat post:27.2mm Required for seat post clamp:31.8mm Work with Disc Brake and Coaster Brake For gas motorized bicycle only 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 3.4L Frame Youtube Link: https://youtu.be/XgKiZlsJhOA CDHPOWER Bicycle Gas Frame 3.4L For 2-Stroke & 4-Stroke Engines. Diameter of downtube:42mm; Requirement on seatpost:27.2mm. Requirement on headset size:1 1/8"; Gas Tank Cap included. Bottom bracket 1.732" /44mm diameter; Item Weight: 11 pounds
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