Size 54 like new! Shimano's Dura-Ace Di2 group offers exceptionally precise shifting, smooth brake modulation, and keeps the overall weight of the Venge to an absolute minimum. The Roval CLX 64 wheels for disc brakes are not only the fastest wheels that Specialized has tested, but they also perform very well in crosswinds, making them perfect for all conditions. A legendary CeramicSpeed bottom bracket ensures that no watt is wasted. FACT Carbon seat post. Disc brakes: reliably slow down in any weather - even in the rain. S-Works Power Cranks: integrated power meter with incredible accuracy and low weight (dual-sided power measurement, +/- 1.5% accuracy). Electronic Shimano Di2 (Digital Integrated Intelligence) shifting: easier, lighter, faster - optimal control at the push of a button; automatic trim function of the front derailleur, best shifting precision, straightforward installation, easy adjustment. Mid-Compact drivetrain. 22 gears.