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Open U.P.P.E.R Easton Ec70 TriStore Carbon Build

  • The superlight U.P.P.E.R. with OPEN U-turn fork for flat-mount disc brakes
  • Fits mountain bike tyres up to 2.1” wide, 40mm cross tyre or a 28mm road tyre
  • Includes: SRAM Force groupset, Ec70 handlebars, Zero carbon seatpost & Zipp 303S wheels
  • Demo bike available in alternate specification




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Product Information

Open U.P.P.E.R Easton Ec70 TriStore Carbon Build

A unique TriStore OPEN / Easton collaboration, that was born out of our love for riding great componentry on the already proven heritage of the Open U.P.P.E.R. The brand new U.P.P.E.R. comes with a lighter frame weight, flat mounts for brakes and 12mm front axle to accommodate even more brake and wheel options. Easton componentry has a great history at the store, having originally been used on our Cervélo road bikes back when we opened the store in 2003 to now becoming experts in mountain bike componentry having combined companies with Race Face. All of this means Easton have the perfect heritage to produce components for our new OPEN builds. 

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.


Frame: OPEN U.P.P.E.R (880g, Medium)


Fork: OPEN U-turn with 12mm thru-axle


Groupset: SRAM Force 


Handlebar: Easton EC70 AX Gravel Bars or EC70 Road Bars (choice of width)


Stem: Easton EA90 SL (choice of length)


Seatpost: Easton EC70 Zero Carbon Post


Crank / Ring: Easton EC90 S2 Crank BB 50 


Wheels: Zipp 303S Carbon 700c Wheelset with Panaracer Gravelking SK Tubeless Tyres