The Sunday Primer 20" BMX Bike is a great entry-level BMX bike. The 20.0" toptube makes this bike a great fit for those riders around the height of 4'10" up to about 5'6", often ideal for those riders just bumping up to the 20" wheel size. The sealed bearings in the bottom bracket and cassette hub makes this a dialed and dependable ride. Specifications: Frame: Sunday Primer, High-Tensile Steel, Integrated Headtube Fork: Sunday Primer, High-Tensile Steel, 2-Piece Steerer Tube, Welded Preload Headset: FSA Integrated (1-1/8") Stem: Sunday Freeze Front Load (48mm) Bars: Sunday, High-Tensile Steel, 2-Piece (28.5" Width) (9" Rise) (12deg Backsweep) (4deg Upsweep) Grips: Sunday Cornerstone Cranks: 3-Piece, Chromoly (160mm Length) Bottom Bracket: Sealed Mid (19mm) Pedals: Wellgo Platform, Plastic Sprocket: Sunday Sabertooth v2, Steel (25 Tooth) Chain: KMC S1 Front Hub: Sunday Low-Flange, Unsealed (3/8" Axle) Rear Hub: Sunday Sealed Cassette (14mm Axle) Driver: 9 Tooth Front Rim: P-7X, Aluminum (20") (36 Hole) Rear Rim: P-7X, Aluminum (20") (36 Hole) Front Tire: Odyssey Path Pro OEM (20 x 2.4") Rear Tire: Odyssey Path Pro OEM (20 x 2.4") Seat: Sunday Badge (Combo) Seat Post: Combo (25.4mm) Seat Clamp: Sunday Brake Lever: Odyssey Springfield Brakes: Odyssey Springfield U-Brake Gyro: N/A Gyro Tabs: Drilled (Not Included) Brake Mounts: Welded Extras: - Color: Orange Soda Weight: 25.8 lbs Geometry: Toptube Length: 20" Chainstay Length: 13.2" - 13.5" Headtube Angle: 75deg Seattube Angle: 71deg Bottom Bracket Height: 11.5" Standover: 8.75" Sizing Guideline: 4' 10" - 5' 6" Rider Height Note: To ensure that every component on your bicycle is working properly, we recommend that all bikes be assembled by a qualified mechanic. Improper assembly of your bicycle may lead to premature wear or failure of individual components such as headsets, crank assembly and wheels. Failure to do so may void the manufacturer warranty.