The Proton has been refined for 2019 just like the rest of the Fly mid-range bike line, The fork has been upgraded to a hydroformed 1-piece steerer tube. This bike now comes with a Trebol headset, a stronger 510 chain, bigger bars and a taller standover height, improving the overall look and feel, The cranks have been upgraded to the clean Trebol Bueno cranks. The 2019 Proton now comes equipped with four pegs, a shorter 13\" rear end and shorter 28mm offset forks that is geared more toward the street riders out there! ###section### Product Specs FRAME MATERIAL: Full 4130 Chromoly WHEEL SIZE: 20\" TOP TUBE LENGTH: 21\" CHAIN STAY LENGTH: TBC HEADTUBE ANGLE: SEAT TUBE ANGLE: FORKS: Full Chromoly, Tapered Legs, 10mm BARS: 9” x 29” 2pc Chromoly STEM: Trebol Top Load HEADSET: Sealed Integrated BRAKE MOUNTS: Removable BRAKES: Fly Springhanger U-Brake FRONT HUB: Trebol Bueno Sealed FRONT RIM: Fly Trebol Double Wall REAR HUB: Trebol Sealed Cassette 9t REAR RIM: Fly Trebol Double Wall TYRES: Trebol 2.35\" SPROCKET: Trebol 25t Aluminum CRANKS: Trebol 3pc 4130 Chromoly 175mm BB: Sealed Mid PEDALS: Ruben Graphite SEAT: Fly Proton Tripod GEARING: 25/9 WEIGHT: 24.6lbs / 11.2Kgs ###section### Product Highlights Longer top tube is great for taller riders who need a bit more room (6ft / 180cm plus) Designed to excel at Street riding thanks to responsive geometry but will feel at home in any riding environment Full 4130 Chromoly frame Sealed bearings throughout 3 pc Chromoly cranks ###shogun-image-section###