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Product Description


The Open U.P. is proving to be one of the most popular bikes on the market. As you probably know already, the Open Cycles U.P. Frameset is unashamedly designed as a quiver-killer. This is a single bike that can race and ride on road and off, and handle cyclocross in style. It has the manners to feel comfortable at low speeds and high, and handle both straight lines and tight turns with aplomb. They call it “gravel plus.”

Open is the latest project of Gerard Vroomen, a co-founder of Cervélo. He’s a restless thinker and Open gives him the opportunity to find the U.P.’s (unbeaten paths) in all of cycling. Some features are things he championed since his Cervélo days, some are new ideas. All are executed brilliantly.

This bike is designed to accept both 700c and 650b wheels. You can run up to a 40mm wide 700c tire and up to a 2.1” wide 650b (aka 27.5”) tire. That 40mm ‘cross tire actually results in an 8mm greater diameter than the seemingly big 2.1” 650b. While the flexibility is nice, wheel options improves performance in all conditions. The 420mm chainstay length is rather short for this application, and it’s a performance benefit. A shorter wheelbase, lighter frame, snappier responses to power spikes is the result.

The gearing is more flexible than tire choices. You can run a single or double ring, with electronic, mechanical, or hydraulic shifting. The inner ring max is 36t, the outer ring max is 50t. When you’re running single chainrings, you can go up to a 46t single if it’s an offset style like SRAM’s, or a 50t if you’re using a flat style ring. The front derailleur hanger is included and is removable.

The seat-angle is 73-degrees which results in a lighter system because you can use a zero-setback seatpost. The seatpost also helps strengthen the frame. To ensure the proper length, there’s a pilot hole in the seat tube. So long as the post can be seen (and it’s precise enough that it doesn’t let water in), you’re good. The shaping of the seat tube is almost square at the bottom, and it tapers to a round 27.2mm size at the top. This is better for a light, compliant, round post.

The post is at the top of the seat stays, which themselves are super-thin and flattened for vertical flex and torsional stiffness. The downtube has been designed for torsional stiffness. It features high-modulus carbon on the sides, and lower-modulus in the middle. Likewise, the top and downtubes are as widely-spaced as possible to improve torsional strength for the fork. This is why the top of the headset is flush with the top tube. Internally, The U.P. runs a tapered 1 1/8” to 1 ½” steerer, also for rigidity. The fork, also set up for wide tires, is a 3T Luteus II Team that is designed for and includes a 15mm thru-axle. The brake attaches via post mounts, with the max rotor size 160mm. The OPEN U.P. is a true class leader and this SRAM Red eTap AXS equipped version makes it better than ever.


  • Frame:  OPEN UP Carbon frame, Flat mount brake standard (1,040g)
  • Fork: OPEN U-Turn Fork; flat mount brake standard


  • Bar Tape Fizik Superlight
  • Bottom Bracket SRAM DUB BB386
  • Brake Calipers SRAM Red HRD
  • Cassette SRAM XG-1290, 12s
  • Chain SRAM Red, 12s
  • Crankset SRAM Red DUB
  • Fork OPEN U-Turn Carbon, Flat Mount
  • Frame Material Monocoque Carbon, Flat Mount
  • Front Derailleur SRAM Red ETap AXS
  • Handlebar 3T Ergoterra Team Stealth
  • Headset 1 1/8" - 1 1/2" Integrated
  • Pedals Not Included
  • Rear Derailleur SRAM Red ETap AXS
  • Rotors SRAM Centerline XR
  • Saddle Selle Italia Novus Flow
  • Seatpost 3T Zero25 Team Stealth
  • Shifters / Levers SRAM Red ETap AXS HRD
  • Stem 3T ARX II Team Stealth
  • Tires Schwalbe G-One Allround, 700x35c
  • Tubes Continental Tour 28
  • Wheel - Front Zipp 303 Firecrest Disc Carbon Clincher
  • Wheel - Rear Zipp 303 Firecrest Disc Carbon Clincher

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