Fit Bike Co Series One BMX

The Series One was our first frame when we started FIT back in 2000 and it’s our most popular bike to date. For 2026 we’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.

20.75” Top Tube

Bars: 2-Piece 9” X 29”

Cranks: 170mm

Details

TT SIZE: 20.75”

• FRAME: Cro-Mo Front Tri
• GEOMETRY: Series One
• HEADSET: Integrated w/Gyro Holes
• BB: Sealed Mid
• BARS: 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 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
• TIRES: FIT OEM 2.4”
• BRAKES: U-Brake w/Low Tension Springs, Two Finger Lever, Linear
• MISC: Sealed Front Hub/ Integrated HT New for 2026