2018 Specialized Stumpjumper ST Alloy 27.5

2018 Specialized Stumpjumper ST Alloy 27.5
MSRP$1,850
WheelsAluminum 27.5″
FrameAluminum
SuspensionFull
Front Travel130mm
Rear Travel130mm
Gearing1 × 11
Drivetrain
Shimano SLX

Specialized’s 2018 Stumpjumper ST Alloy 27.5 is a mid-range component level aluminum frame trail bike.

specialized.com

Build
FrameAluminum
ForkRockShox Recon RL, Solo Air, 42mm offset, rebound adjust, lockout, Boost Maxle Lite thru-axle
Rear ShockX-Fusion 02 Pro RL, Rx Trail Tune, rebound adjust, lockout 190mm x 42.5mm
Bottom BracketSRAM PowerSpline
StemSpecialized Trail, 3D forged alloy, 4-bolt, 6° rise
HandlebarSpecialized, 6061 alloy, 780mm width, 8° backsweep, 6° upsweep, 27mm rise
SaddleBody Geometry Henge Sport, steel rails, 143mm width
SeatpostAlloy
PedalsSpecialized Dirt
GripsSpecialized Sip, half-waffle, S/M: regular thickness, L/XL: XL thickness
Components
Front Derailleur
Rear DerailleurShimano SLX, Shadow Plus, GS cage
ShiftersShimano SLX, 11-speed
CrankSRAM NX, Boost, direct-mount X-Sync
CassetteSunrace, ED black, 11-speed, 11-46 tooth
ChainKMC X11 with Missing Link
Chain Guide
BrakesTektro Gemini Comp with 200mm front/180mm rear rotors
Brake LeversTektro Gemini Comp
Wheels
RimsDouble-wall, 27mm internal width, 32 hole
SpokesStainless, 14g
Front HubSpecialized, sealed cartridge bearings, boost front and rear
Rear HubSpecialized, sealed cartridge bearings, boost front and rear
TiresFront: Butcher 2.3", GRID casing, GRIPTON compound, 2Bliss Ready Rear: Purgatory 2.3", GRID casing, GRIPTON compound, 2Bliss Ready
Gearing
1 × 11 — 11 speed
2018 Specialized Stumpjumper ST Alloy 27.5
24 mph
Similar Bikes
26 mph

The 2018 Stumpjumper ST Alloy 27.5 is easier to ride up hills than similar bikes.

The 2018 Stumpjumper ST Alloy 27.5 won‘t keep up with similar bikes while riding downhill or sprinting.

Geometry

Oh snap! This frame was drawn from the actual bike geometry measurements. Roll over the table below to highlight frame dimensions.

Size
Stack 586590618631
Reach 425444465490
Stack/Reach Ratio1.381.331.331.29
Top Tube Length 568591624657
Seat Tube Length 380410455505
Seat Tube Angle76.376.075.675.2
Head Tube Length 105110140155
Head Tube Angle66.566.566.566.5
BB Drop 30303030
BB Height 325325325325
Chainstay Length 432432432432
Wheelbase 1,1491,1701,2031,234
Standover Height 744749761762
🐐 Measurements listed in millimeters and degrees
MSRP$1,850
WheelsAluminum 27.5″
FrameAluminum
SuspensionFull
Front Travel130mm
Rear Travel130mm
Gearing1 × 11
Drivetrain
Shimano SLX
Gearing
1 × 11 — 11 speed
2018 Specialized Stumpjumper ST Alloy 27.5
24 mph
Similar Bikes
26 mph

The 2018 Stumpjumper ST Alloy 27.5 is easier to ride up hills than similar bikes.

The 2018 Stumpjumper ST Alloy 27.5 won‘t keep up with similar bikes while riding downhill or sprinting.

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