The version 2.0 of the Riff offers practical updates in features and geometry without going all-in with progressive geometry that almost everyone is chasing. Slightly steeper seat angle for more efficient climbing and shorter seat tubes to benefit dropper posts. ED coating inside frame and under the paint increase rust resistance Boost 148mm rear hub spacing Geometry is optimized for 120mm forks. Will work well with a 100mm fork, too. Tange Prestige heattreated butted CrMo steel; butted CrMo rear end ISO disc brake tabs IRD Broski Sliding Dropouts Sbend seat stays and chainstays Rear rack and fender eyelets Dropper post cable routing runs on downtube and inside the seat tube 34.9mm seat collar(not included), 400mm post recommended CNCmachined 44mm headtube: Will fit 1-1/8" steerers with a ZeroStack 44 headset or fit tapered steerers with a ZS44 upper assembly and external cup (EC44) lower assembly Recommended tire size: 27.5 x 1.95" – 2.8” Only the Large size frame comes with bottle mounts on the seat tube 5.7 lbs (XS)