The Topstone Carbon 3 GRX 1X has a full carbon frame and fork with the KingPin rear suspension system creating 30mm of travel – read backside comfort - in the rear end. Finished with Shimano GRX componantry including a single 40t chainset, 10-51t 12 speed cassette, hydraulic brakes and tubless ready WTB Riddler 700x45c tyres, just add luggage and away you go.