









Fit Bike Co Series One Bike
Description
The Series One was FIT's first frame when they started back in 2000, and it’s their most popular bike to date. For 2026, they have upgraded to a CNC-machined Integrated headtube and a fully sealed bearing front hub. The S1 frame and fork have been lightened up and offered in 3 top tube sizes with corresponding handlebar and crank sizes.
Specifications
Frame: Cro-Mo Front Tri
Geometry: SERIES ONE
Headset: Integrated w/Gyro Holes
BB: Mid Sealed
Bars: 20.25/20.5TT 2-Piece 8.7”x 29”, 20.75TT 2-Piece 9” x 29”
Fork: Cro-Mo Steerer, 33mm Offset, Welded Insert
Stem: FIT Top Load
Seat: More Padded Integrated Combo, 200mm Post
Cranks: Tubular Cro-Mo. 20.25TT 160mm, 20.5TT 165mm, 20.75TT 170mm
Sprocket: FIT Key 25T
Pedals: FIT PC
Front Wheel: FIT S1W Rim w/Sealed Hub
Rear Wheel: FIT S1W Rim w/Sealed 9T Cassette
Tyres: FIT OEM 2.4”
Brakes: U-Brake w/Low Tension Springs, Two Finger Lever, Linear Cable
Misc: Sealed Front Hub/ Integrated HT New for 2026
Specifications
Frame: Cro-Mo Front Tri
Geometry: SERIES ONE
Headset: Integrated w/Gyro Holes
BB: Mid Sealed
Bars: 20.25/20.5TT 2-Piece 8.7”x 29”, 20.75TT 2-Piece 9” x 29”
Fork: Cro-Mo Steerer, 33mm Offset, Welded Insert
Stem: FIT Top Load
Seat: More Padded Integrated Combo, 200mm Post
Cranks: Tubular Cro-Mo. 20.25TT 160mm, 20.5TT 165mm, 20.75TT 170mm
Sprocket: FIT Key 25T
Pedals: FIT PC
Front Wheel: FIT S1W Rim w/Sealed Hub
Rear Wheel: FIT S1W Rim w/Sealed 9T Cassette
Tyres: FIT OEM 2.4”
Brakes: U-Brake w/Low Tension Springs, Two Finger Lever, Linear Cable
Misc: Sealed Front Hub/ Integrated HT New for 2026