Mountain Bike Frame: Bike Suspension Frame 27.5er Softtail Mountain Bike Frames 16‘’, Ride More Stable. Disc Brake Bike Frame: Disc Brake B-Post 51mm, QR 135mm, Max. 2.4‘’ Tyres, Fits 160mm Rotors. Aluminium Alloy Bike Frame: High-Strength Aluminium Alloy Material, Fish Scale Welding Process, Further Enhance The Overall Rigidity. Quick Release Bike Frame: 44-55mm Headset, 30.4mm Seatpost, Threaded Bottom Bracket 68mm, Recommended 165mm Rear Shock Absorber (Not Included) Bushings 24-52mm. Bike Frame: The Frame Has A Variety Of Colours To Choose From, And The Brakes Are Externally Routed To Adapt To A Variety Of Terrains, Such As Forest Roads, Grass, Mountains And So On.