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Proton Bmx
Bikes
20" Bikes Proton Bmx
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• SAME DAY SHIPPING

All bikes are hand-assembled at the Fly warehouse and fully customizable following these steps:

1. Select the bike you want using the size, color, drive side & brake options.
2. Proceed with the order confirmation.
3. For any specific part change, just write in the comments section at checkout the part you’d like to replace.
4. Confirm your order

- Our team will review your request and contact you the same day to confirm the specs and info.
- If the chosen part has a higher price, you’ll receive a payment link by email to cover the difference.
- If the chosen part is not available, we´ll send you the delivery info.
- Please note that no refunds are issued for parts of lower value.

• Products in stock are shipped in 24 hours to 7 working days.
• The option without brakes does not include any brake hardware.
• Easy Assembly with our 100% plastic-free recyclable packaging.
• LHD (Left-Hand Drive) and RHD (Right-Hand Drive):
Where the drivetrain is located to protect the chain/sprocket when you grind.

The PROTON model is the setup that brings control, durability, and all-around performance, built with street geometry that flows just as well on transitions or trails.

SPECIFICATIONS

Proton Bmx Specs
  • GEOMETRY:
  • TOP TUBE LENGTH
    21”
  • CHAIN STAY LENGTH
    13.2”
  • HEAD TUBE ANGLE
    75º
  • SEAT TUBE ANGLE
    71º
  • BB HEIGHT
    11.75”
  • STAND OVER HEIGHT
    9”
  • FORK OFFSET
    27mm.
  • BAR RISE
    9”
  • BAR WIDTH
    29”
  • BAR BACKSWEEP
    10º
  • BAR UPSWEEP
  • _
  • SPECIFICATIONS:
  • Frame
    Full 4130 CrMo / Removable Brake Mounts
  • Fork
    Integrated cone shape design / Full 4130 CrMo / 1 Piece Steer Tube
  • Bars
    Full 4130 CrMo
  • Grips
    Fly Devon / 160 mm Long
  • Stem
    Trebol Top Load / Forged / 6061-T6 Aluminum / 50mm
  • Headset
    Internal Sealed Bearing
  • Lever
    Generic Inged / Forged / 6061 T-6 Aluminum
  • Brake
    Trebol Springhanger / Forged / 6061 T-6 Aluminum
  • Cranks
    Trebol 3Pc / 4130 CrMo / 170 mm Arm Length
  • Bottom Bracket
    Mid / Sealed Bearing
  • Sprocket
    Trebol / CNC Machined / 6061-T6 Aluminum / 25T
  • Pedals
    Fly Ruben Graphite / Nylon - Fiberglass Compound
  • Chain
    510 Type / 69 Links
  • Rims
    Trebol / Semi-double Walled / 6061-T6 Aluminum / 36H
  • Front Hub
    Trebol Male / Sealed Bearing / 10mm Male Axle / 36H
  • Rear Hub
    Trebol Male Cassette / Sealed Bearing / 14mm Male Axle / 36H / 9T
  • Tires
    Fly Fuego 2.30" Front & Rear / 60 TPI / 120 PSI
  • Seat
    Fly Proton Tripod / 100% Synthetic Leather / 25 mm Thickness
  • Post
    Trebol Tripod / Forged & CNC Machined / 6061-T6 Aluminum / 135 mm
  • Pegs
    Trebol HS Steel 2 Pairs
  • Weight (brakeless)
    11.9 Kg. / 26.2 lb.

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