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Open U.P Flat Mount Shimano Ultegra / XT Di2 TriStore Build

  • Revolutionary road, cross & mountain bike frame now comes in a unique Shimano TriStore build
  • The OPEN U.P. is the true 'one bike quiver': road, cyclocross and mountain bike in one
  • The New U.P. shares the same DNA as the original but adds a new fork and flat-mount disc brakes
  • New OPEN U-Turn fork is lightest for this style of bike




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Product Information

Open U.P Flat Mount Shimano Ultegra / XT Di2 TriStore Build

The New U.P. frame, now available in a unique Tristore Shimano Ultegra Di2 build. The frame retains the performance-oriented road geometry & parts with clearance for mountain bike tyres from the original. Start on asphalt, hit the gravel, switch to single track. Its geometry makes you fast; its tyres unstoppable. The New U.P. differs in that it accepts flat-mount brakes (which are lighter, making for a stiffer braking system, and better looking) and ships with the new OPEN U-turn fork - as well as the fantastic new colours!



Full Specification


Classic U.P. vs New U.P. vs U.P.P.E.R.

The 3 members of the U.P. (Unbeaten Path) family all combine a road riding position with clearance for mountain bike tires. Get out of town on asphalt, hit the gravel roads or switch to singletrack. Your position gets you there fast; the big tires make you unstoppable.

Every U.P. and U.P.P.E.R. shares the same shape, geometry, intended use and most importantly: tire clearance. But they differ in layup, weight, fork, disc brake mounts, thru-axles and colour.

Disc brake mounts

One of the key differences between the Classic U.P. on the one hand and the new U.P. and U.P.P.E.R. on the other is the disc mount standard. The Classic U.P. uses post-mount, the other two are designed for flat-mount.

To use the lightest possible brakes from both Shimano and SRAM, you need their flat-mount brakes. And thanks to the U-turn fork, you can make those set-ups even lighter by removing the normally required adapter. A win-win.

U-turn Fork

The new U-turn fork doesn't just save you weight on the flat-mount brake, it is also extremely light itself. At 375 grams, it is by far the lightest fork that fits GravelPlus tires. And to save even more weight, it comes with an extremely light 12mm Carbon-Ti custom axle.

Tyre clearance

The U.P. fits mountain bike tires up to 2.1” wide. But you can also fit a 40mm cross tire, or a 28mm road tire, or anything else in-between (exact tire sizes depend on manufacturing tolerances and rim width, so this is a guideline. Always make sure you have 6mm clearance between tire and frame).

Fully-internal cables/hoses

External cables & hoses collect dirt, risk getting stuck behind objects (particularly expensive with electronic shifting) and frankly, they are ugly. So the U.P. runs them internally. 

With OPEN's proven MultiStop design, you can customize the frame for 2x10/11, 1x10/11 and Di2 shifting. Just pick the right insert. In case you run a single chainring, you can also remove the front derailleur hanger to further clean up the frame.



In the box: Frame, fork, headset, seat tube collar, front & rear thru-axle, 2 derailleur hangers, 1 front derailleur mount, 3 MultiStops (2x, 1x, Di2), chainstay cable exit, BB guide, cable liners, noise-reduction foam sleeves.


Handlebars & Stem: Easton EA70 AX Gravel Bars or Easton EA70 Road Bars (choice of width), Easton EA70 Stem (choice of lentgh)


Saddle & Seatpost: Specialized Romin Evo Expert Saddle, Easton EC70 Zero 272.2mm Seatpost 


Wheels & Tyres: DT Swiss GR1600 SPLINE 700c Wheelset and Specialized Sawtooth 700x38c Tyres or GR1600 SPLINE 650b and Maxxis Beaver 2.1" Tyres set up tubeless


Groupset: Shimano Ultegra Di2 + XT Di2 rear mech with Easton EA90 SL Direct Mount Chainset

Size Guide