2020 Sunday Forecaster Alec Siemon Signature 20" BMX

The Forecaster is a model that rides, feels and looks like a pro-level bike. This is Alec Siemon’s signature bike. You’ll find other Sunday Signature spec’d design cues like the Sunday Seeley Grips, combined with incredible parts like an Odyssey Clutch v2 Freecoaster hub, Odyssey Twisted Pro pedals, and Path Pro tires.

A truly dialed bike for every style of riding. Follow @alec_shmalec.


  • Frame: 20.75" TT, integrated 1-1/8" head tube, CroMo DT and DO, w/ removable brake hardware.
  • Fork: Sunday Forecaster, 20" fork w/ 2-piece chromoly steerer tube and welded pre-load. 
  • Handlebar: Sunday, 9 x 28.5", 12° backsweep, 4° upsweep, 2-piece.
  • Stem: Sunday Freeze Top load, 48mm. 
  • Headset: FSA integrated, 1-1/8". 
  • Alloy Cap: Sunday M16, aluminium. 
  • Brake Lever: Odyssey Springfield. 
  • Brakes: Odyssey Springfield U-brake. 
  • Brake Cable: Odyssey Quik Slic. 
  • Grips: Sunday Jake Seeley. 
  • Seat: Sunday Badge, Pivotal. 
  • Seat Post: Sunday Pivotal. 
  • Seat Clamp: Sunday.
  • Sprocket: Sunday Sabertooth V2, 25T, steel. 
  • Cranks: 170mm, 3-piece, chromoly. 
  • BB Parts: Sealed, Mid, 19mm. 
  • Pedals: Odyssey Twisted PC Pro. 
  • Rims: Sunday Lightning, 20", 36H. 
  • Front Hub: Sunday, 36H, low-flange, sealed , 3/8" female axle. 
  • Rear Hub: Odyssey Clutch V2 FC, 36H, 14mm female axle w/ 9T driver, RHD, non-drive PC guard. 
  • Spokes: 14g steel, black. 
  • Tires: Odyssey Path Pro OEM, 20 x 2.4" (F & R). 
  • Chain: KMC Z1 wide.


        • Top Tube Length: 20.75". 
        • Head Tube Angle: 75.5°.
        • Seat Tube Angle: 71°. 
        • Chainstay Length: 13.25-13.5”. 
        • Bottom Bracket Height: 11.5". 
        • Standover: 9".

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