FLY Bikes Proton CST Complete Bike

The Proton is Fly's all-rounder for control, durability and performance: street geometry that also flows on transitions and trails. 100% 4130 chromoly frame, fork and bar, removable brake mounts, sealed bearings and Fuego tires. The CST version has a cassette rear hub with 9T driver, a 2-piece bar and comes with one pair of pegs. Available as LHD or RHD – the side the chain runs on, so you can protect your drivetrain on grinds.

Specifications

• Top tube length: 21"
• Chainstay length: 13"
• Head tube angle: 75°
• Seat tube angle: 71°
• Standover height: 9.25"
• BB height: 11.75"
• Frame: 100% 4130 Chromoly, removable brake mounts
• Fork: 100% 4130 Chromoly, 1-pc steerer tube, 27 mm offset
• Handlebar: 100% 4130 Chromoly, 2-piece, 9" rise, 29" width, 10° back sweep, 2° up sweep
• Grips: Flybikes Devon, 160 mm long, Flybikes barends
• Stem: Trebol Topload, forged 6061-T6 aluminium, 50 mm reach
• Headset: Trebol integrated, sealed bearings
• Brake lever: Trebol, forged 6061-T6 aluminium, right
• Brake: Trebol Springhanger, forged 6061-T6 aluminium
• Cranks: Trebol 3-pc, 4130 Chromoly, 170 mm arm length
• Bottom bracket: Mid BB, sealed bearings
• Sprocket: Trebol, CNC machined 6061-T6 aluminium, 25T
• Pedals: Flybikes Ruben Graphite, Nylon-Fiberglass compound
• Chain: 510, 69 links
• Rims: Trebol, double side wall, 6061-T6 aluminium, 36h
• Front hub: Trebol Bueno, sealed bearings, 10 mm Female axle, 36h, incl. hubguard
• Rear hub: Trebol Cassette, sealed bearings, 14 mm axle, 36h, 9T driver, incl. hubguard
• Tires: Flybikes Fuego 20" x 2.3" front and rear, 60 TPI casing, max. 120 PSI (ca. 8.3 bar)
• Pegs: Trebol HS steel, 1 pair
• Seat: Flybikes Proton Tripod, 100% synthetic leather, 25 mm thick padding
• Seat post: Trebol Tripod, forged & CNC machined 6061-T6 aluminium, 135 mm length
• Seat clamp: Integrated
• Weight: 11.2 kg