electrical bike Specialised Stumpjumper Evo Information – Finest Path bikes
When the present model of Specialised Stumpjumper launched in 2018, it was throughout a second frenzied mountain bike geometry evolution. Every little thing was getting decrease, longer and slacker. However not the Stumpy: The geometry it rolled out with in 2018 wasn’t lengthy or slack even on the time of its launch—it was low, however then Specialised mountain bikes have been low for eons—and it in a short time started to look dated.
The exception was the Evo mannequin. This model of the Stumpy had a geometry that seemed progressive on the time and nonetheless holds up in the present day. Of all of the Stumpy variations I attempted (the Evo 29er, the 29er lengthy journey, the 29er brief journey, and the 27.5 long travel) the Evo was, I assumed, was the most sorted was as a result of it had the clearest function—a mid-travel gravity-oriented, party-time, path bike—and was effectively dialed to fulfill that function.
However Specialised doesn’t sit on a mannequin for lengthy. Although the Stumpy Evo was nonetheless a progressive bike, there may be, as of in the present day, an all-new Evo. What does that imply for the “common” Stumpjumper? All I can say is Tuesday, Oct. thirteenth, at 9 am Pacific Time.
The New Stumpjumper Evo
The brand new SJ Evo may disguise in plain sight as a result of, with a look, it’s exhausting to inform the distinction between it and the earlier technology. The most recent model maintains the FSR four-bar suspension design, the uneven strut from the highest tube to the seat tube, and the SWAT in body storage within the down tube of the earlier Evo.
Although it seems very a lot the identical, the brand new Evo may be very new. Journey was bumped up 10mm on each ends—it’s now a 150/160mm bike—however the modifications appear like they make the brand new Evo into a greater total path bike with extra versatility and higher climbing manners than the earlier technology Evo.
However figuring out that path riders are a various and demanding bunch, Specialised constructed a number of tuning instruments into the Evo, which permits them to fine-tune the bike to their wants. These instruments embody six geometry settings, a impartial inventory air spring curve that may be simply tuned kind of progressive, a rear suspension that’s appropriate with air or coil-sprung shocks, and an elective shock hyperlink that corrects geometry and kinematics when the Evo is run as a combined wheel dimension bike (27.5 rear and 29 entrance) bike.
The brand new Evo is available in six sizes (the earlier Evo got here in two), with size-specific carbon layups and tube sizes. The layup and tube dimension changes fall underneath Specialised’s “Rider First Engineered” program that debuted in its Tarmac SL5 road bike and supplies all riders the identical really feel and expertise on the path it doesn’t matter what body dimension they journey, or so the corporate claims.
Weight was additionally thought of, with Specialised claiming an S4 Evo body in ready-to-build kind weighs 2750 grams (a contact over six kilos). That’s shockingly mild for a 29er body with piggyback shock and adjustable geometry.
The dimensions of the SWAT storage compartment within the downtube is 15-percent bigger, so riders can disguise an even bigger stash. Specialised additionally developed a 22-ounce fluid reservoir that matches contained in the compartment permitting riders to successfully carry two-bottles (the brand new Evo nonetheless holds a bottle inside the principle triangle) with out strapping something to their again or hips.
Utilizing a number of the classes discovered within the growth of the Enduro, the SJ Evo’s foremost pivot is greater now, which creates a extra rearward preliminary axle path. This, claims Specialised, permits the rear wheel to trace over bumps higher and works in live performance with an preliminary shock charge tuned for small bump sensitivity.
About 50mm into the bike’s journey or a contact previous the sag level, the axle path begins shifting ahead, permitting the suspension to maneuver unhindered by chain torque. At this level, the shock charge turns into extra supportive than the earlier technology Evo. The final little bit of the journey is extra progressive than the previous-generation bike to suck up impacts from large hits and full sends higher.
Specialised labored to get this inventory tune sorted with a medium-sized air quantity spacer within the Fox DPX2’s air can. This enables riders to tune the suspension really feel by operating a smaller spacer—for a much less progressive really feel—or make it much more progressive by popping in a bigger quantity spacer.
The kinematic modifications additionally increase preliminary anti-squat values, which hints at a crisper pedaling bike, with higher help and fewer movement. The anti-squat worth falls off in a short time after the sag level, which the Evo’s product supervisor, Steve Saletnik, advised me helps the Evo’s suspension monitor higher and supply higher grip on tough and ledgey climbs.
The shock charge is one which works with both air or coil shocks, however most fashions—completes and frames—include Fox DPX2 piggyback air shocks. The exception is the combined wheel dimension Evo LTD mannequin, which comes with a RockShox Deluxe Choose Plus coil-over.
Extra Sizes and Six Geometry Choices
Accessible sizes bounce from two (S2, S3) to 6—S1, S2, S3, S4, S5, S6. Whereas they could possibly be correlated to the same old extra-small to double XL t-shirt type sizing many body use, the S-sizing system lets riders choose a dimension based mostly on most popular attain and really feel and never standover (From S2 to S6, stand over peak solely modifications 6mm). Many riders ought to have the ability to be match on two or three totally different body sizes, permitting riders to decide on a smaller dimension for a shorter, faster, and livelier feeling bike, or a bigger dimension for a roomier and extra planted feeling bike.
Utilizing myownself for instance (173cm tall, 725mm saddle peak to the middle of BB), I sometimes journey a “medium” mountain bike: The S3 appears bang-on to me, however I may simply drop right down to an S2 or bounce as much as an S4 without having to resort to seatpost or stem hijinx to suit comfortably on the bike.
Geometry is adjustable, however moderately than utilizing a flip-chip just like the earlier technology to regulate angles and BB peak, the brand new Evo has two separate changes. An eccentric headset cup system gives three head tube angle settings (slack, center, steep) and a complete of two-degrees of head tube angle adjustment. Chips within the decrease rear pivots present +/- 7mm of BB peak adjustment and 0.5 levels of angle adjustment.
In whole, there are six geometry choices that produce 2.5 levels of whole head tube angle change (63 to 65.5 levels), 12mm of BB drop change (32 to 44mm), 27mm of wheelbase change, however lower than one diploma of whole seat tube angle change.
The S1 dimension does get some particular tweaks to make it as small as doable. It runs a shorter 150mm fork (different sizes have a 160mm fork), and a 5mm-shorter stroke shock (50mm stroke VS 55mm for the opposite sizes). This helps drop the S1’s standover to 733mm, a full three-centimeters decrease than the S2. S1 bikes additionally get 165mm cranks, a 100mm drop submit, a 35mm lengthy stem, and a steeper seat tube angle. Key dealing with dimensions (head tube angle, path, chainstay size) are the identical as the opposite sizes.
S2 by means of S5 fashions have 170mm cranks; the S6 will get 175mm arms.
Fashions—Carbon Solely For Now
At launch, Specialised solely gives carbon Evo fashions. There are 5 full bikes, and the opening value is $4,099. I count on lower-priced fashions with aluminum body will arrive ultimately, however there was no point out of them within the Specialised’s press data. The 5 fashions are
All fashions seem to make use of the identical FACT 11m body, so that you get the identical body whether or not you purchase the bottom Stumpjumper Evo Comp mannequin or the $9,899 S-Works Evo. You should buy the body for $2,999 in case you desire to choose your components.
All fashions run 1×12 drivetrains with 30-tooth chainrings. The bottom Evo Comp is the one mannequin with Shimano drivetrain and brakes (SLX—great things), and the one mannequin with a 180mm rear rotor paired to the 200mm entrance—all different fashions have 200mm rotors at each ends. All different fashions run SRAM drivetrain and brakes.
All fashions get four-piston calipers (SRAM Code apart from the bottom Evo Comp), 2.3-inch huge tires entrance and rear with Specialised mid-weight GRID Path tubeless-ready casing, 30mm-internal width tubeless-ready rims, lock-on grips, and shocks with climbing change. All fashions include a series information: the S-Works, Professional, and LTD fashions get MRP bash guides.
The 27.5-inch wheeled Evo mannequin is gone. Most fashions include 29er wheels entrance and rear: the exception is the combined wheel (27.5 rear, 29 entrance) Evo LTD ($7,799), which includes a hyperlink that corrects geometry and kinematics. This hyperlink is obtainable aftermarket for riders who need to run a mixed-wheel bike. The LTD mannequin is the one mannequin with RockShox suspension: RockShox Zeb Choose Plus fork and a RockShox Tremendous Deluxe Choose Plus coil-over shock. All different fashions use Fox 36 forks and DPX2 air shocks.
All of the builds look fairly strong. The sweet-spot construct to me is the Evo Knowledgeable ($4,899). It has the Fox GRIP2 damper and open mode modify on the shock—options the bottom mannequin doesn’t. From there, it’s a substantial bounce as much as the $7,299 Evo Professional, which has dearer and probably lighter components—Fox Manufacturing facility suspension and dropper, carbon rims, carbon handlebar), however doesn’t provide any extra options or perform than the Knowledgeable. The satin maroon coloration on the Professional is beautiful, although.
How does the brand new Evo journey? Pricey reader, I want I may let you know, however resulting from… issues… Specialised was not in a position to get me a mannequin forward of in the present day’s launch. I’ll get one to evaluation quickly, and I stay up for sharing my impressions with you.
I did obtain a journey report from a buddy who works at a Specialised seller and attended a demo day. This buddy is a Lycra sporting skinny and quick XC sort. His private bike is an Epic, so I used to be genuinely stunned when he reported being impressed with the brand new Evo’s climbing and pedaling manners, and that it provided responsive dealing with. That appears to bode effectively for the Evo’s total attraction and functionality.