Specialized Stumpjumper Comp Alloy 29er

MTB Blog

As an avid mountain biker, I can say that purchasing the 2019 Specialized Stumpjumper Comp Alloy 29er was a great upgrade to my riding experience!

I wasn’t looking to buy a new bike but like any avid mountain biker I am always scouring the classifieds for good deals and when I had the chance to sell my old 2017 Marin Attack Trail 8 and buy this new Stumpjumper for almost no cost to me, it was a deal too good to pass up.

All new for 2019 is the asymmetrical brace between the top and the seat tube, which is supposed to ensure optimum stiffness. I also like the clean look of the frame with minimal graphics, internal cable routing and small touches like the custom designed chain stay protector.

The bike is equipped with a FOX DPS Performance rear shock with 140mm of rear travel. I initially thought the 140mm of travel would not be sufficient as my Marin offered 160mm, but I’ve taken the bike on a number of rides to Whistler Bike Park and haven’t had any issues with the shock. I’m not getting huge air off the jumps so for a beginner rider like me I find the 140mm of travel is more than enough.

riding at whistler bike park

Upfront I have a Fox Float Rhythm 34 with 150mm of travel. I have no complaints about this fork and it has certainly saved me a few times when I’ve come down a little too nose heavy from a jump. I use a Syncros Trail Fender mud guard to keep all that Pacific Northwest mud off me. This fender is compatible with the Fox Rhythm shock as it screws right into the fork crown, eliminating the need for zip ties and making installation and maintenance easy.

The Specialized Stumpjumper Comp Alloy 29:

  • Frame: Asymmetrical M5 alloy
  • Fork: FOX 34 FLOAT Rhythm 150 mm
  • Shock: FOX FLOAT DPS 140 mm
  • Brakes: SRAM Guide R 200/180 mm
  • Drivetrain: SRAM NX Eagle
  • Handlebar: Chromag OSX 780 mm
  • Grips: ODI Rogue Lock-On
  • Dropper: PNW Loam Lever
  • Saddle: Ergon SM Pro Men
  • Wheels: Roval Traverse 29″
  • Tires: Maxxis Minion DHr/DHR

In the back I have a SRAM NX Eagle Cassette with the big 50 tooth ring. The Eagle is the lighter and tougher drivetrain that SRAM offers in counterpart to their Powerglide II. Its weight advantage enables for greater performance and the gear range is great for the trails that I regularly ride on and makes ascents much easier. One negative is the SRAM NX Derailleur which hasn’t been shifting as smoothly and consistently as I would like. Even after getting it checked out several times, it never seems to dial in smoothly, so I’m just waiting till I whack it on a rock to replace it.

The brakes are a SRAM Guide R4 Piston Caliper, which I am very impressed with. When compared to the Shimano brakes, the modulation is much better. The brakes are not too stiff or too flexible and I feel greater control and consistency in light brakes, hard stops and panic stops.

The oval chainring is another great feature of the bike. It is designed to eliminate uneven pedal stroke that you may experience with a round chainring and reduces the need for shifting over longer rides. While the technology is nothing new, it does enhance the experience of trail riding with the Stumpjumper.

As someone new to flat pedals, I can say that they have given me renewed confidence in riding. One of the key benefits is being able to jump away from the bike when necessary and trains me to use proper weighting and loading techniques instead of yanking the bike to maintain contact and pressure.

The Chromag OSX handlebar was originally at 780mm but I cut it down to 760mm because that’s what I had on my Marin but I now sort of regret making the cut. I rode the 780mm for a couple of weeks before I chopped it down and while I felt it was ok I thought that going down to a 760mm would be better. However immediately after I cut it I regretted it as the 760mm felt too short. I might buy another handlebar at 780mm and experiment a bit more to see which length I like better.

The bar is fitted with ODI Rogue Grips which have grooves that allows the air to flow through, keeping my hands cool. This is an added benefit if you are a glove-free biker like myself!

My Stumpjumper is also fitted with a PNW Loam Lever, which is a quality dropper post lever that enables smooth seat adjustability when riding. The seat itself is an Ergon SM Pro which is effective at distributing pressure evenly when riding. The seat offers German technology to relieve pressure in sensitive areas and I love the freedom of movement and lightweight feel offered by the durable cushion!

jumping time!

Overall, I am very satisfied with my Specialized Stumpjumper Comp Alloy 29er. The frame and geometry of the bike matches those of Specialized’s pricier carbon frame bike, but at a more affordable price. The light aluminum frame and 29” wheels give it a smooth ride on the trails and the sleek white color makes the bike stand out.

The SRAM NX components could be better but I can otherwise say that I am proud to own Specialized’s Stumpjumper and would highly recommend it to any avid mountain biker!