Pay in three equal instalments 3 x This is the 2025 Proton 21″ bike and it has a few update compare to previous year models, now comes with new better cranks and black hubs
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 – 2º
_
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.