FIT Series One 2025 BMX Bike

The Series One was the first frame when FITBIKECO started back in 2000 and it's their most popular bike to date. For 2026 they've upgraded to a CNC machined Integrated headtube and a fully sealed bearing front hub. The S1 frame and fork has been lightened up and offered in 3 top tube sizes with corresponding handlebar and crank sizes.

Specification

Frame and Forks

• Frame: Cro-Mo Front Tri
• Forks: Cro-Mo Steerer, 33mm Offset, Welded Insert
• Headset: Integrated W/Gyro Holes

Drivetrain

• Cranks: Tubular Cro-Mo 160mm
• Bottom Bracket: Mid Sealed
• Sprocket: FIT Key 25T
• Pedals: FIT PC

Steering

• Bars: 2-Piece 8.7"X 29"
• Stem: FIT Top Load

Seating

• Seat: More Padded Integrated Combo, 200mm Post

Braking

• Brakes: U-Brake W/Low Tension Springs, Two Finger Lever, Linear Cable

Wheels

• Front Wheel: FIT S1W Rim W/Sealed Hub
• Rear Wheel: FIT S1W Rim W/Sealed 9T Cassette
• Tyres: FIT OEM 2.4"

Not Matched

• Geometry: SERIES ONE
• Sealed Front Hub/ Integrated HT New For 2026