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Stumpjumper Comp Alloy 27.5

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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

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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

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

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

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

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SMLXL
Crank Length170MM170MM170MM170MM
Handlebar Width780mm780mm780mm780mm
Stem Length45MM60MM60MM60MM
Saddle Width143mm143mm143mm143mm
Seatpost Length390mm430mm430mm430mm
Stack590mm599mm608mm617mm
Reach388mm414mm442mm464mm
Head Tube Length105mm115mm125mm95mm
Head Tube Angle67°67°67°67°
BB Drop18mm18mm18mm18mm
Trail104mm104mm104mm104mm
Fork Length, Full542mm542mm542mm542mm
Fork Rake/Offset46mm46mm46mm46mm
Front Center677mm706mm738mm764mm
Chainstay Length420mm420mm420mm420mm
Wheelbase1096mm1126mm1158mm1184mm
Top Tube Length, Horizontal553mm585mm618mm646mm
Bike Standover Height742mm748mm762mm774mm
Seat Tube Length396mm430mm468mm523mm
Seat Tube Angle74°74°74°74°
Geometry

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