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Stumpjumper Comp Alloy 27.5
2018 Stumpjumper Comp Alloy 27.5
When you need to blend ruggedness, efficiency, and downright nimbleness into one trail bike, it's pretty damn hard to beat the confident construction of an alloy frame like the Stumpjumper Comp Alloy 27.5.
It features an M5 alloy construction that's lightweight, durable, and plenty stiff and compliant, while SRAM's most durable one-by components have been hand-selected to ensure that you get the most performance over rugged terrain possible. Furthering this, you'll also find a FOX FLOAT Rhythm fork with 150mm of travel up front, a custom-tuned RockShox Monarch RT3 at the rear, and powerful SRAM Guide R brakes.
And when you factor in our proprietary Rx Trail Tune at the shock, plus an aggressive, trail-eating geometry that features absurdly short chainstays, a roomy top tube, a low bottom bracket, and a slacked out front end, you get a nimble trail bike that you can be confident in, season after season.
Technical Specifications
FRAMESET
FRAME
Specialized M5 Aluminum, 27.5 Trail Geometry, PF30 BB, internal cable routing, ManFu link, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 150mm of travel
SEAT BINDER
Alloy, 34.9mm
SUSPENSION
REAR SHOCK
RockShox Monarch RT, Rx Trail Tune, AUTOSAG, rebound and 2-position compression adjust, 197x48mm
FORK
FOX FLOAT Rhythm 34 27.5, 44mm offset, 2-position, tapered alloy steerer, 15x110mm Boost™, 150mm of travel
WHEELS
RIMS
Roval Traverse 27.5, hookless alloy, 29mm inner width, tubeless ready, 24/28h
FRONT HUB
Stout Pro 110 disc, alloy sealed cartridge bearings, 15x110mm spacing, 24h
REAR HUB
Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h
SPOKES
DT Swiss Industry, stainless, 3-cross, 2.0"
FRONT TIRE
Butcher, GRID casing, Gripton compound, 2Bliss Ready, 27.5 x 2.6"
REAR TIRE
Butcher, GRID casing, Gripton compound, 2Bliss Ready, 27.5 x 2.6"
INNER TUBES
Standard, Presta valve
DRIVETRAIN
REAR DERAILLEUR
SRAM GX, long cage, 11-speed
SHIFT LEVERS
SRAM GX, trigger, 11-speed
CASSETTE
SRAM XG 1150, 11-speed, 10-42t
CHAIN
KMC X11, 11-speed w/ Missing Link™
CRANKSET
Race Face Aeffect, PF30
CHAINRINGS
Steel, 30T
BOTTOM BRACKET
Race Face PF30
COCKPIT
STEM
Specialized Trail, 3D forged alloy, 4-bolt, 6-degree rise
HANDLEBARS
Specialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 27mm rise, 780mm width
GRIPS
Specialized Sip Grip, half-waffle, S/M: regular thickness, L/XL: XL thickness
SADDLE
Body Geometry Henge Comp, hollow Cr-Mo rails, 143mm
SEATPOST
Command Post IRcc, 12-position micro-height adjustable, alien head design, bottom mount cable routing, remote SRL lever, 30.9mm, S: 100mm, M/L/XL: 125mm of travel
BRAKES
FRONT BRAKE
SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200/180mm rotor
REAR BRAKE
SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180/160mm rotor
ACCESSORIES
PEDALS
Specialized Platform, Cr-Mo, 9/16" spindle
* Weights based on production painted frames as pictured. Actual weights will vary based on colorway, frame size, and component variation. Specifications are subject to change without notice.
Geometry
| S | M | L | XL | |
|---|---|---|---|---|
| Crank Length | 170MM | 170MM | 170MM | 170MM |
| Handlebar Width | 780mm | 780mm | 780mm | 780mm |
| Stem Length | 45MM | 60MM | 60MM | 60MM |
| Saddle Width | 143mm | 143mm | 143mm | 143mm |
| Seatpost Length | 390mm | 430mm | 430mm | 430mm |
| Stack | 590mm | 599mm | 608mm | 617mm |
| Reach | 388mm | 414mm | 442mm | 464mm |
| Head Tube Length | 105mm | 115mm | 125mm | 95mm |
| Head Tube Angle | 67° | 67° | 67° | 67° |
| BB Drop | 18mm | 18mm | 18mm | 18mm |
| Trail | 104mm | 104mm | 104mm | 104mm |
| Fork Length, Full | 542mm | 542mm | 542mm | 542mm |
| Fork Rake/Offset | 46mm | 46mm | 46mm | 46mm |
| Front Center | 677mm | 706mm | 738mm | 764mm |
| Chainstay Length | 420mm | 420mm | 420mm | 420mm |
| Wheelbase | 1096mm | 1126mm | 1158mm | 1184mm |
| Top Tube Length, Horizontal | 553mm | 585mm | 618mm | 646mm |
| Bike Standover Height | 742mm | 748mm | 762mm | 774mm |
| Seat Tube Length | 396mm | 430mm | 468mm | 523mm |
| Seat Tube Angle | 74° | 74° | 74° | 74° |
Manual Downloads
Rider Reviews
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