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Proton Bmx
Bikes
20" Bikes Proton Bmx
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Hand-assembled to order at the Fly warehouse and fully customizable following these steps:

1. Select the bike you want using the options available on the website.
2. Proceed with the order confirmation.
3. For any specific part change, just write in the comments the part you’d like to replace.
4. Confirm your order

- Parts with higher price: 30% discount to the individual price difference.
- Preorder bikes: 50% discount to the individual price difference.
- Upcharge Payment: Once the order is confirmed, we´ll send you a link to proceed.
- If the chosen part is not available, we´ll inform you the delivery info.
- No refunds are issued for parts of lower value.

• 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.

Due to possible supply-chain issues or shipping delays specs are subject to change without notice. The swap part will always be similar model with the same or even higher quality.

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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