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Sierra Bike
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Signature Bikes Sierra Bike
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The new Fly Sierra bike is designed to be our fast and flowy bowl and trails machine, just the way Sergio Layos and Dovey like it!
Starting with our Sierra frame, bars and seat signed by Sergio, this amazing BMX loves hitting the ground with its powerful and accurate style. Including all of our Volcano line, this bike has the perfect high quality steering system. And it also comes with the fan-favorite Rubén Alcántara signed drivetrain to ensure you get the fastest trails BMX available.
This is a top of the line bike that you can have in an incredible dark red color. The Sierra bike is also stacked with full Rubén Alcantara signed tires, grips, pedals and more aftermarket parts that make it a top of the line bike now available in a dark red color to get that flaming effect just on top of any trail.

SPECIFICATIONS

Sierra Bike Specs
  • Geometry:
  • TOP TUBE LENGTH
    20.6 / 21”
  • CHAIN STAY LENGTH
    13.6”
  • HEAD TUBE ANGLE
    74.5º
  • SEAT TUBE ANGLE
    71º
  • BB HEIGHT
    11.5”
  • STAND OVER HEIGHT
    9.25”
  • FORK OFFSET
    33 mm.
  • BAR RISE
    8.5 / 9"
  • BAR WIDTH
    29”
  • BAR BACKSWEEP
    10º
  • BAR UPSWEEP
  • _
  • Specifications:
  • Frame
    Sierra / Full 4130 CrMo / Heat treated HS, BB / Invest Casting Heat Treated Dropouts / EBS brake system
  • Fork
    Volcano 33 / Full 4130 CrMo / 1 Piece Steerer Tube CNC / Invest Casting Heat Treated dropouts
  • Bars
    Sierra / Full 4130 CrMo / Multiple Butted
  • Grips
    Fly Ruben 2 / 160 mm Long
  • Stem
    Fly Volcano 25mm Rise / 50mm Reach / CNC Machined / 6061-T6 Aluminum
  • Headset
    Volcano 15 / Sealed Bearing / CNC Machined / 6061-T6 Aluminum
  • Lever
    None
  • Brake
    None
  • Cranks
    Dolmen 175 mm. / 4130 CrMo / 2.5p Construction / 1p Invest Casting Arm
  • Bottom Bracket
    Rotar Mid 22mm. / Sealed Bearing
  • Sprocket
    Fly Tractor / CNC Machined / 7075-T6 Aluminum / 28T
  • Pedals
    Fly Ruben Graphite / Nylon - Fiberglass Compound
  • Chain
    Tractor / 4130 CrMo Heat Treated / Hollow Pins Chromium Treatment / 74 Links
  • Rims
    Fly Piramide / Double Wall / 6061-T6 Aluminum
  • Front Hub
    Trebol / Sealed Bearing / 3/8” Female Axle / 36H
  • Rear Hub
    Trebol / Sealed Bearing / 14mm Female Axle / 36H / 9T
  • Tires
    Fly Ruben Ligera 2.40 Front / Fly Ruben 2.25 Rear / 60 TPI / 120 PSI
  • Seat
    Fly Sierra 3 Seat / 100% Synthetic Leather / 7 mm Thickness
  • Post
    Fly Tripod / CNC Machined / 6061-T6 Aluminum / 135 mm Long
  • Weight 21" / 9" version
    11.4 kg. / 25.1 lb.
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