2012 All Mountain Bike Tests at Interbike Outdoor Demo

26er 27.5 29er Enduro

Specialized Stumpjumper Expert Carbon EVO 29er

I stood in line at the Scott tent for like 15-20 minutes waiting to get a shot at the new Genius 700 (650B) or 900 (29er) only to find out the ones sitting there had been reserved ahead of time. Gonna have to look into that for next year. I saw the option on my Interbike iPhone App but didn’t take advantage of it.

Shut out I wandered next door to the Specialized tent which didn’t look all that busy for a change. I had the new Enduro Expert on my list but had to settle for this Stumpjumper Expert Carbon 29er. Not a bad “compromise” in the end because it was a pretty cool bike.

The Stumpy was fairly light for a 29er but not crazy light. Componetry was top shelf as you’d expect with an msrp of $6200. The 135mm-travel Expert Evo 29 features a Fox Float CTD Factory shock with AUTOSAG and Boost Valve, Fox 34 TALAS CTD Performance fork, and Roval Traverse 29 142+ wheelset mounted to Specialized Purgatory and Butcher tires.

  • FACT 9M carbon front triangle with M5 rear and 29er EVO geometry, 135mm of travel, tapered head tube, 142mm dropouts, PF30 BB, and sealed cartridge bearing pivots
  • FOX Float CTD Evolution shock with Specialized proprietary AUTOSAG, Boost Valve, and Kashima coating features 3 compression settings: Climb, Trail and Descend, plus ProPedal
  • FOX 34 TALAS CTD Performance 29 fork features 140-110mm of adjustable travel, settings specifically for climbing and descending, and a 15mm thru-axle
  • Roval Traverse 29 142+ all-mountain wheelset, with DT Swiss internals and spokes, 15mm thru-axle, and a 142+ rear hub spacing
  • All-new 2Bliss ready Specialized Butcher Control 29 2.3″ dual-compound front tire
  • All-new 2.3″ Purgatory Control rear tire.
  • Custom SRAM S2200 carbon double XC Trail crankset with 33/22 gearing
  • Specialized 720mm-wide, alloy XC Mini-Riser handlebar
  • All-new Sip Grip, a lock-on, Aramid infused, half-waffle MTB grip boosts durability, comfort and control
  • Avid X0 Trail World Cup hydraulic disc brakes .
  • SRAM PG-1050, 10-speed 11-36t cassette compliments the 2×10 XC Trail drivetrain
  • Specialized Command Post BlackLite uses a remote lever to adjust the saddle height on-the-fly

With the 95 degree heat we were both starting to feel pretty knackered by this time so opted for the more docile Lakes Loops on this test run. The Stumpy probably deserved a good thrashing down Skyline and and East leg but I was pleasantly surprised at how well it did XC too. The Lakes Loops are fun, flowy, mostly smooth up and down trails on the lower benches of Bootleg Canyon with a couple of big G-outs and rocky ridges to traverse, so the test wasn’t totally lacking in chunkiness.

The Stumpy flowed like water on the rolling stuff and I could really feel it carrying speed well through the g-outs and various ups and downs on these loops. One particularly rocky ridge descent got inhaled and spit out by the big, stiff, plush rolling stumpy. In fact I’m surprised I didn’t pinch flat here as the bike allowed me to attack it with (semi) reckless abandon. My legs were gassed so climbing was gratefully easier than it should have been albeit quite slow.

I’d like to take this bike back out on fresh legs with the Giant Trance X 29er and Intense Carbine 275 and repeat the same route we did earlier for a more direct comparison. I’ll bet it would’ve held its own pretty well in that company.

I’m pretty sure this is an EVO from the paint scheme and spec but not 100% sure.

Partly internal cable routing for the Command post.

Talk about Extremely Loud and Incredibly Close! Whatever you do, keep your thumb away from this lever until your privates are well clear and you’re ready for a seat to be launched into your crotch. Wow.

Sorry about the out-of-focus image but this little red button on the side of the FOX Float CTD Evolution shock is how you activate AUTOSAG feature. Simply pump up the shock to 250-300 lbs then sit on the seat and press this little red button and the shock blows off air pressure until you’re sagged the proper amount. Pretty slick.

New Purgatory Control 2.3 tires connect you to the contact patch in the rear and the new 29er Butcher Control 2.3 hooked you up in the front. Traction was quite good which is one of the supposed advantages to 29er wheels that I’ve never really thought about until I rode the Stumpy.

Very beefy BB area that must add to the lateral stiffness of the frame.

About the author: Kent Robertson

Kent Robertson (better known to Mtbr forum users as KRob) is just a guy who likes to ride. A lot. Kent’s 52 and has been riding mountain bikes for almost two decades, though he says his love of two-wheeled conveyances began when he was 5. His favorite trail type is any, be it fast and flowy, steep and chunky, or jumpy and droppy. Even a mellow bike path cruise with his wife makes him happy. “If I’m on two wheels it’s a good day.” Kent calls Ely, Nevada, home, but he’s ridden all over the western U.S. from Moab and Fruita, to Tahoe and Oregon, to a bunch of places in between. And while Kent focuses on the ride more than the bike, he’s ridden and tested a ton of bikes and knows what makes for a good ride — and a good bike. You can read more from Kent on his personal website, www.stuckinthespokes.com

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