Annex Si

  • Year: 2019
  • MSRP: $279.99 *
  • Sizes: 19.5"
  • Colors: Gloss Black, Race Red
  • Weight: 22.3 lbs

With its 19.5" top tube alloy frame, the Annex Si is a great starting point for riders who are considering hitting the local BMX track for the first time but also want a bike that can handle every day riding. The 165mm cranks and 40/16 gearing make pedaling a breeze whether on the track or on the way to school and the stylish BMX race inspired graphics are sure to catch attention.


  • 6061 alloy frame with 19.5" top tube
  • Full hi-ten fork with 1 1/8" threadless steer tube
  • Hi-ten 7.5" bar and Haro alloy front load stem
  • 1-piece 165mm crank with USA loose ball BB
  • 40/16t gearing
  • Haro padded fully adjustable seat
  • Kenda Kontact 20 x 1.95" front and 1.75" rear tires
  • Promax V-Brake and lever
Frame Components
Frame Alloy 6061 frame with 19.5" TT.
Fork 1 1/8" Hi-Ten -Threadless
Cranks Steel 1pc. 165mm
Bottom Bracket LB USA BB
Gearing 40/16
Pedals Wellgo plastic 1/2"
Tires Kenda Kontact 20x1.95 F/20x1.75 R
Wheels/Rims 36H Alloy single wall
Hubs 3/8" axle: 36h Alloy Shell loose ball Rear
Braking System
Brakes Promax MV-295L Alloy V-brake - rear only
Brake Levers Promax XL-378 Alloy Lever
Other Components
Grips Velo Knurled Grips
Handle Bar Hi-Ten 7.5" bars
Stem Haro Alloy front load stem
Seat Padded adjustable seat
Seat Post Steel
Pegs N/A
Size Head Angle Seat Angle Top Tube Seat Tube Chainstay BB Height Stand Over
19.5 74° 70° 495mm (19.5") 250mm (9.8") 352mm (13.9") 293mm (11.5") 546mm (21.5")


Owner's manual: Bike Manual PDF (Opens in a new window)

*Actual retail price may vary based on any added dealer freight, tax, and assembly fees