All New Specialized Stumpjumper

Words by George Shipman

on 17/04/2018 14:42:26

Specialized have a lot to say about their newest creation:

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The new Stumpjumper is the ultimate trail bike. Seriously, the damn thing rides like it's on rails. It's the most versatile trail bike we've ever made. And yeah, we're stoked about that, but we're even more excited about how well it's tuned to you. We've said goodbye to proprietary bullsh*t, focused on your needs, and made, what we feel, is the new benchmark in trail bikes.

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Shop the range HERE

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Real-World testing led to the evolution of the Stumpjumper.  We wanted to push it harder, and after identifying that this was really the result of a lack of stiffness, we developed our own mountain-specific stiffness test that examined the connection between a rider’s hands and feet. When each get different signals, you get confused.

Extensive field testing was performed in order to fine-tune the front-end stiffness. Our team would go and ride a working version of the frame, provide feedback, and then we’d overwrap the frame with carbon plies, test it in the lab to record the stiffness values, and then give it back to the rider. We did this exact fine-tuning process over and over until we hit the perfect balance of stiffness and handling. And the result is a bike that feels like it’s riding on rails. Point it where you want, and you’re going there. This is Rider-First Engineered™ for mountain, and it delivers the ultimate trail ride—regardless of size.

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The New Key Innovations are:

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Specialized


ALL-NEW SIDEARM FRAME

We pulled out all the stops to lighten and stiffen up the frame, and what we arrived at was a vastly more efficient structure with a new sidearm design. The sidearm design directly connects all three mounting points of the rear-end and shock to the frame, and this creates a significant increase in both stiffness and performance over bumps. More explicitly, frame flex has been minimized when the rear suspension is active. In CAD, we were able to put the new 3D shape against the last iteration of the Stumpjumper, and with Finite Element Analysis (FEA), we were able to prove that the new layout was 20% more efficient. At the end of all of this, we've ended up with one of the lightest trail frames on the market.

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Specialized


FLIP CHIP

The Flip Chip allows you to change the frame geometry with ease, all to support your riding style. There are two settings, High and Low, and when you "flip the chip," you effectively change the bottom bracket height by 6mm and the head tube angle by half-a-degree.

This also lessens the reach by 5mm – The overall standard reach of the Stumpjumper has been increased up-to 35mm too.

There is also now a lower stand over height and a 160mm Dropper post.

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Specialized


ULTIMATE ADJUSTABILITY

This is the best mountain bike we've ever made when it comes to customizing it however you want. All of the configurations use standard stroke and eye-to-eye metric shocks, so you won't find Shock Block anywhere. So yeah, if you want to swap shocks—be our guest. You won't have any problems from us or the Stumpjumper. We've also ditched the PF30 bottom bracket of yesteryear in favour of moving back to a threaded BB system, and both 27.5 and 29 frames can fit up to 3.0" tires, now. You'll still want to check with your fork manufacturer to make sure a high-volume tire can fit, but this should be music to everyone's ears.

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Specialized


QUIETER DRIVETRAINS AWAIT

The new chainstay protector makes the drivetrain virtually silent, and it pretty much makes chain slap a thing of the past, too. The nubs on this protector disrupt the slap of the chain and this reduces the overall movement and sound of the chain.

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Specialized 


SWAT DOWN TUBE STORAGE

The SWAT™ Down Tube Storage takes everything we loved from the last generation and makes it sleeker and lighter, while also adding 20% more volume.

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No Proprietary Components – No Shock Block or Autosag combined Metric shock sizing means it’s easy to swap the shock to the rider’s preference.  Threaded BB means more crank and BB options.  27.5 and 29 frames take up to a 3.0 tyre (remember to check fork clearance!)

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Improved Cable Routing – true ‘straight through’ outer cable routing to keep the bike out of the jig.

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All the bikes now come with a Threaded BB.

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So what Models are available?

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Stumpjumper 29 – 150mm front, 140mm rear

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Stumpjumper 27.5 – 150mm front, 150mm rear

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NEW TO THE LINE-UP: Stumpjumper ST 29 – 130mm front, 120mm rear

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Available in SJ 29er and 27.5:

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Comp Alloy £2500 – Fox 34 Rhythm, DPS Perf, SLX/XT 11, SLX Brakes, Traverse Rims

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Comp Carbon £3500 - Fox 34 Rhythm, DPS Perf, SLX/XT 11, SLX Brakes, Traverse Rims

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Expert £5000 – RS Pike RC, Deluxe RT3, GX Eagle, Guide R, Traverse Carbon Rims

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S-Works £8000 – Fox 36 Factory, Factory DPX2, XX1 Eagle, Guide RSC, Traverse SL Wheelset

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Available in the SJ ST:

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Comp Alloy £1700 – RS Recon RL, X-Fusion, SLX/Sunrace 11, Tektro Gemini, Alex Rims

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Comp Carbon £3500 – Fox 34 Rhythm, DPS Perf, SLX/XT 11, SLX Brakes, Traverse Alloy Rims

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Expert Carbon £5000 – RS Pike RC, Deluxe RT3, GX Eagle, Guide R, Traverse Carbon Rims

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S-Works - £8000 – Fox 34 Factory, Factory DPS, XX1 Eagle, Guide RSC, Traverse SL Wheelset

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Shop the range HERE

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See the video for an in-depth talk about the engineering for the new Stumpjumper:

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Contact the stores to find out more or to organise a test ride HERE