Specialized Stumpjumper ST Alloy 27.5 bike

PERFECTLY-BALANCED SUSPENSION

Our in-house suspension-tuning team develops custom shock tunes, perfectly paired to each bike’s kinematics. We call this Rx Tune and while it’s not the easy way to build a suspension bike, it’s worth it. You feel Rx Tune as perfectly-balanced suspension.

SMART PARTS PICK

• 27.5 wheels accentuate the Stumpjumper ST’s playful on-trail feel.

• 130-millimeters of suspension courtesy of a RockShox Recon RL fork.

• SX Eagle 12-speed drivetrain gives you single-ring simplicity and gearing to spare.

TECHNICAL SPECIFICATIONS

FRAMESET

FRAME	M5 alloy chassis and rear end, asymmetrical design, 27.5 Trail Geometry, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 130mm of travel
SEAT BINDER	Specialized bolt-type, alloy, 38.6mm

SUSPENSION

REAR SHOCK	X-Fusion 02 Pro RL, Rx Trail Tune, rebound adjust, lockout 190x45mm
FORK	RockShox Recon RL, Motion Control damper with low-speed compression to lockout, 46mm offset, rebound adjust, 15x110mm Boost™ Maxle® Lite thru-axle, 130mm of travel

COCKPIT

STEM	Specialized, 3D-forged alloy, 4-bolt, 7-degree rise
HANDLEBARS	Specialized Trail, 6061 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 31.8mm clamp, XS 720mm, S-XL 750mm,
GRIPS	Specialized Sip Grip, half-waffle, slip-on
SADDLE	Body Geometry Myth:155 XS/S, Body Geometry Henge:143 M/L/XL, steel rails
SEATPOST	TransX dropper, 34.9mm, XS: 100mm, S: 125mm, ML/XL: 150mm Travel

BRAKES

FRONT BRAKE	Tektro Gemini Comp, hydraulic disc, resin pad, 200mm
REAR BRAKE	Tektro Gemini Comp, hydraulic disc, resin pad, 180mm

DRIVETRAIN

REAR DERAILLEUR	SRAM SX Eagle, 12-speed
SHIFT LEVERS	SRAM SX Eagle, trigger, 12-speed
CASSETTE	SRAM PG-1210 Eagle, 11-50t
CHAIN	SRAM SX Eagle, 12-speed
CRANKSET	SRAM SX Eagle, Powerspline, 170mm
CHAINRINGS	Steel, 32T
BOTTOM BRACKET	SRAM Powerspline

WHEELS

RIMS	Double-wall alloy, 27mm internal width
FRONT HUB	Specialized, sealed cartridge bearings, 15x110mm thru-axle, 32h
REAR HUB	Specialized, sealed cartridge bearings, 12x148mm thru-axle, 32h
SPOKES	Stainless, 14g
FRONT TIRE	Purgatory, GRID casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.3″
REAR TIRE	Purgatory, GRID casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.3″
INNER TUBES	Presta, 40mm valve