Fit Bike Co Series One BikeThe Series One was FIT's first frame when they started back in 2000, and its 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.
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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