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Colnago might well have a crystal ball in their offices. Years ago, they decided disc brakes were the future, and they’ve been building just about everything with a disc brake model ever since. The AC-R Disc Ultegra Bike is the AC-R’s version thereof.

Fans of disc brakes say that hydraulics are where you find the real benefits of the technology. It’s because both pads squeeze the rotor, rather than just one, because the calipers adjust themselves, because the modulation is that much better. Shimano has finally released their mechanical/hydraulic STI lever and Colnago was quick to put them into use. Here, they’re commanding a Shimano 105 derailleurs, pushing a Shimano chain over a 50/34 compact crank and an 11-28 eleven-speed cassette. These pieces alone show Colnago’s desire to bring high performance down to a low price point.

The brakes themselves take advantage of Shimano’s Ice-Tech cooling innovations, with the mixed-metal and cooling-finned 140mm rotors and pads backed with more cooling fins. This allows the small-diameter rotor to work hard at stopping without ever overheating. The bike, equipped with post mounts for the brakes, uses conventional quick-releases front and rear both for cost and convenience.

The wheels are designed in-house and feature 23mm wide Vittoria Zaffiro training tires. These have a supple, but tough casing, and plenty of tread for lots of flat-free miles.

The frame is the smart cousin of Colnago’s M10s, a perennial WorldTour contender. That frameset has seen action under sprinters, climber, rouleurs, as it is both sufficiently stiff and comfortable for a ride that you can handle all day and still not feel beat-up afterwards. Comfort, which is also defined by a geometry that everyone can fit, is key to Colnago, as that’s where the foundation of fast and efficient come from.

Colnago builds bikes to last. Their head tube  hides their proprietary headset system, in which the tapered steerer turns on bearings sitting in replaceable cups: these will give before your bike in a hard front-end crash. The bottom bracket is the traditional BSA threaded standard, which has generations of success. The cabling is internal through the down and top tubes, and can easily be switched from the mechanical you see here to electronic, with the battery either internal or under the down tube.

The Colnago AC-R Disc Ultegra Bike is both technology-forward and a great value.


  • Bottom Bracket Shimano
  • Brake Calipers Shimano BR-R785
  • Cassette Shimano 105 5800, 11-28
  • Chain Shimano
  • Crankset Shimano FC-RS500, 50/34
  • Fork Colnago AC-R Carbon Disc
  • Frame Material Monocoque Carbon
  • Front Derailleur Shimano 105 5800
  • Handlebar Deda RHM 01
  • Headset FSA No63/51E
  • Pedals Not Included
  • Rear Derailleur Shimano 105 5800
  • Rotors Shimano SM-RT81, 140mm CL
  • Saddle Selle Italia Q-Bik
  • Seatpost Colnago Alloy, 31.6mm
  • Shifters / Levers Shimano BR-RS505
  • Stem Deda Zero One
  • Tires Vittoria Zafiro, 700x23c
  • Wheel - Front Colnago Disc CXD26
  • Wheel - Rear Colnago Disc CXD26
*Specifications are subject to change.

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