Stumpjumper Comp Alloy 650b
Part No.:  

Stumpjumper Comp Alloy 650b

Part No.:  129077
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Stumpjumper Comp Alloy 650b
Overview
Technical Specifications
Geometry

When you need to blend ruggedness, efficiency, and down right nimbleness into one trail bike, it's pretty damn hard to beat the confident construction of an alloy frame like the Stumpjumper Comp Alloy 650b.

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

DRIVETRAIN
CHAIN KMC X11, 11-speed w/ Missing Link™
BOTTOM BRACKET Race Face PF30
CRANKSET Race Face Aeffect, PF30
SHIFT LEVERS SRAM GX, trigger, 11-speed
CASSETTE SRAM XG 1150, 11-speed, 10-42t
CHAINRINGS Steel, 30T
REAR DERAILLEUR SRAM GX, long cage, 11-speed
SUSPENSION
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
REAR SHOCK RockShox Monarch RT, Rx Trail Tune, AUTOSAG, rebound and 2-position compression adjust, 197x48mm
WHEELS
FRONT HUB Specialized, sealed cartridge bearings, 15x110mm spacing, 24h
REAR HUB Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h
INNER TUBES Standard, Presta valve
SPOKES DT Swiss Industry, stainless, 3-cross, 2.0"
RIMS Roval Traverse 27.5, hookless alloy, 29mm inner width, tubeless ready, 24/28h
FRONT TYRE Butcher, GRID casing, Gripton compound, 2Bliss Ready, 27.5 x 2.6"
REAR TYRE Butcher, GRID casing, Gripton compound, 2Bliss Ready, 27.5 x 2.6"
COCKPIT
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
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
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
FRAMESET
SEAT BINDER Alloy, 34.9mm
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

Geometry

Geometry Chart

Stumpjumper - Geometry

S M L XL
  S M L XL
Handlebar Width 780mm 780mm 780mm 780mm
Crank Length 170MM 170MM 170MM 170MM
Stem Length 45MM 60MM 60MM 60MM
Seatpost Length 390mm 430mm 430mm 430mm
Saddle Width 143mm 143mm 143mm 143mm