Stumpjumper Comp Alloy 27.5
Part No.  

Stumpjumper Comp Alloy 27.5

Part No.  129077
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Stumpjumper Comp Alloy 27.5
Overview
Technical Specifications
Geometry

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.

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.

  • M5 alloy Trail Chassis with Stumpjumper FSR rear end blends durability, stiffness, and light weight, while 150mm of travel Trail Geometry provide more than capable handling.
  • A RockShox Reba RL fork handles suspension up front with ease, soaking up bumpy terrain with 150mm of plush travel.
  • SRAM's 11-speed GX groupset features a wide gear range that delivers climbing and descending efficiency in spades. On top of this, the one-by setup is notorious for being next to impossible to drop a chain with, plus it provides a significant weight savings in comparison to a standard two-by setup.

Technical Specifications

BOTTOM BRACKET
Race Face PF30 18
FRONT BRAKE
SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200/180mm rotor 24
SHIFT LEVERS
SRAM GX, trigger, 11-speed 13
REAR BRAKE
SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180/160mm rotor 25
SPOKES
DT Swiss Industry, stainless, 3-cross, 2.0" 8
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 1
REAR TIRE
Butcher, GRID casing, Gripton compound, 2Bliss Ready, 27.5 x 2.6" 10
HANDLEBARS
Specialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 27mm rise, 780mm width 20
GRIPS
Specialized Sip Grip, half-waffle, S/M: regular thickness, L/XL: XL thickness 21
SADDLE
Body Geometry Henge Comp, hollow Cr-Mo rails, 143mm 22
FRONT HUB
Specialized, sealed cartridge bearings, 15x110mm spacing, 24h 6
PEDALS
Specialized Platform, Cr-Mo, 9/16" spindle 26
REAR DERAILLEUR
SRAM GX, long cage, 11-speed 12
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 23
SEAT BINDER
Alloy, 34.9mm 2
FORK
RockShox Reba RL, tapered alloy steerer, 46mm offset, external rebound, low speed comp to lockout, 15mm Maxle® Lite, custom 15x110mm Boost™, 150mm of travel 4
INNER TUBES
Standard, Presta valve 11
CASSETTE
SRAM XG 1150, 11-speed, 10-42t 14
CHAINRINGS
Steel, 30T 17
STEM
Specialized Trail, 3D forged alloy, 4-bolt, 6-degree rise 19
CHAIN
KMC X11, 11-speed w/ Missing Link™ 15
CRANKSET
Race Face Aeffect, PF30 16
REAR SHOCK
RockShox Monarch RT, Rx Trail Tune, AUTOSAG, rebound and 2-position compression adjust, 197x48mm 3
REAR HUB
Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h 7
RIMS
Roval Traverse 27.5, hookless alloy, 29mm inner width, tubeless ready, 24/28h 5
FRONT TIRE
Butcher, GRID casing, Gripton compound, 2Bliss Ready, 27.5 x 2.6" 9

Geometry

Geometry Chart

Stumpjumper - Geometry

S M L XL
  S M L XL
Crank Length 170MM 170MM 170MM 170MM
Stem Length 45MM 60MM 60MM 60MM
Seatpost Length 390mm 430mm 430mm 430mm
Saddle Width 143mm 143mm 143mm 143mm
Handlebar Width 780mm 780mm 780mm 780mm
Reach 388mm 414mm 442mm 464mm
Top Tube Length, Horizontal 553mm 585mm 618mm 646mm
Stack 590mm 599mm 608mm 617mm
Wheelbase 1096mm 1126mm 1158mm 1184mm
Chainstay Length 420mm 420mm 420mm 420mm
Front Center 677mm 706mm 738mm 764mm
BB Drop 18mm 18mm 18mm 18mm
Seat Tube Angle 74° 74° 74° 74°
Head Tube Angle 67° 67° 67° 67°
Seat Tube Length 396mm 430mm 468mm 523mm
Head Tube Length 95mm 105mm 115mm 125mm
Bike Standover Height 742mm 748mm 762mm 774mm
Fork Rake/Offset 46mm 46mm 46mm 46mm
Fork Length, Full 542mm 542mm 542mm 542mm
Trail 104mm 104mm 104mm 104mm