Specification BikeType : City Bike Brand : CDHPOWER BulletPoint : Frame Size: Length: 54" Height: 19 5/8" Clamp: 25.4mm, Head Tube Size: Long: 120mm ID:32.5mm, Material: Steel BulletPoint1 : CDHPOWER Bicycle Gas Frame 3.4L For 2-Stroke & 4-Stroke Engines. Requirement on switch of gas frame: 10*1.5mm rear width:126mm BulletPoint10 : TRUSTED DURABILITY: Provides long-lasting protection with minimal maintenance, giving you peace of mind while riding. BulletPoint2 : 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 BulletPoint3 : Gas Tank Cap included; For gas motorized bicycle only BulletPoint4 : Diameter of downtube:42mm; Requirement on seatpost:27.2mm BulletPoint5 : 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. BulletPoint6 : SunTour XCT V3 long travel, preload, advanced LOCKOUT Included BulletPoint7 : Needs 27.2mm Seat Post and 31.8mm Seat Clamp BulletPoint8 : 135mm rear Spacing and 100mm Front Spacing BulletPoint9 : Will require 68mm English Threaded bottom bracket Capacity : 3.4 Color : Brushed Alum CompatibleWithVehicleType : Bicycle Department : unisex-adult ExternallyAssignedProductIdentifier1 : 747100306266 ExternallyAssignedProductIdentifier2 : 0747100306266 FuelType : Gasoline ImportDesignation : Imported IncludedComponents : Bicycle Pump ItemDisplayWeight : 10.35 pounds ItemName : CDHPOWER Bicycle Gas Frame 3.4L w/ Fuel Tank, Built in 3.4L Gas Frame - Brushed Alum-Gas Motorized Bicycle Felt Faker ItemPackageDimensions_Height : 117.475 centimeters ItemPackageDimensions_Length : 17.78 centimeters ItemPackageDimensions_Width : 54.102 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : mountain-bicycle-frames LeagueName : cycle Manufacturer : cdhpower Material : Aluminum ModelName : Basecamp 3.0 PartNumber : CDH-UU-4 Pattern : Solid ProductDescription : 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 diameter; Gas Tank Cap included; Diameter of downtube:42mm Requirement on switch of gas frame: 10*1.5mm ProductGrade : Like New ProductSiteLaunchDate : 2017-04-10T07:00:00.000Z Size : 21 inch fits most riders 6'2 to 6'4" SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnspscCode : 25170000