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2018 Specialized Stumpjumper Comp Alloy 29/6Fattie

Original specifications: geometry for 5 published sizes.

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At a glance

Model year
2018
Category
Mountain
Original MSRP
$2,800.00
Sizes
S, M, L, XL, XXL
Colors
Gloss Hyper/Mint Clean, Satin Black/White Clean
Geometry
5 manufacturer sizes
In this record
22 specifications · 4 archived images · original MSRP · geometry
Archive ID
900003884
Campaign
Original buildAluminum

Manufacturer catalog

Published sizes and colors

5 sizes · 2 colors

Manufacturer-published sizes and colors; availability and exact size/color pairings may vary by market or production run.

Published sizes

SMLXLXXL

Published colors

Gloss Hyper/Mint CleanSatin Black/White Clean

Frameset

Frame ConstructionSpecialized M5 Aluminum, 29/6Fattie Trail Geometry, PF30 BB, internal cable routing, ManFu link, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 135mm of travel
Frame MaterialAluminum
ForkRockShox Reba RL, tapered alloy steerer, 51mm offset, external rebound adjust, low speed comp to lockout, 15mm Maxle® Lite thru-axle, custom 15x110 Boost™, 150mm of travel
Fork MaterialAluminum
Rear ShockRockShox Monarch RT, Rx Trail Tune, AUTOSAG, rebound and 2-position compression adjust, 197x48mm

Drivetrain

ShiftersSRAM GX, trigger, 11-speed
Rear DerailleurSRAM GX, long cage, 11-speed
CranksetRace Face Aeffect, PF30; chainrings: Steel, 28T
Bottom BracketRace Face PF30
CassetteSRAM XG 1150, 11-speed, 10-42t
ChainKMC X11, 11-speed w/ Missing Link™
PedalsSpecialized Platform, Cr-Mo, 9/16" spindle

Brakes

Brakes(F) SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200/180mm rotor / (R) SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180/160mm rotor

Cockpit & Contact Points

HandlebarSpecialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 27mm rise, 780mm width
StemSpecialized Trail, 3D forged alloy, 4-bolt, 6-degree rise
SaddleBody Geometry Henge Comp, hollow Cr-Mo rails, 143mm
SeatpostCommand 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

Wheels & Tires

Hubs(F) Specialized, sealed cartridge bearings, 15x110mm spacing, 24h / (R) Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h
RimsRoval Traverse 29, hookless alloy, 29mm internal width, tubeless-ready, 24/28h
SpokesDT Swiss Industry, stainless, 3-cross, 2.0"
Front TireButcher, GRID casing, Gripton compound, 2Bliss Ready, 29 x 2.3"
Rear TirePurgatory, GRID casing, Gripton compound, 2Bliss Ready, 29 x 2.3"

Geometry

5 sizes · 19 measurements

Frame measurements by size.

All geometry measurements5 sizes · 19 measurements
MeasurementSMLXLXXL
Seat tube396 mm430 mm468 mm523 mm564 mm
Effective top tube551 mm582 mm611 mm647 mm674 mm
Head tube125 mm145 mm170 mm95 mm95 mm
Head-tube angle67.5°67.5°67.5°67.5°67.5°
Seat-tube angle74°74°75°75°75°
Chainstay / rear center437 mm437 mm437 mm437 mm437 mm
Wheelbase1115 mm1143 mm1172 mm1206 mm1232 mm
Bottom-bracket drop36 mm36 mm36 mm36 mm36 mm
Reach389 mm417 mm435 mm461 mm477 mm
Stack617 mm617 mm645 mm663 mm686 mm
Standover height750 mm757 mm766 mm776 mm778 mm
Fork offset / rake46 mm46 mm46 mm46 mm46 mm
Front center680 mm708 mm738 mm771 mm797 mm
Trail104 mm104 mm104 mm104 mm104 mm
Fork length / axle-to-crown551 mm551 mm551 mm551 mm551 mm
Seatpost length390 mm430 mm430 mm430 mm430 mm
Crank length170 mm170 mm170 mm170 mm170 mm
Stem length45 mm60 mm60 mm60 mm60 mm
Handlebar width780 mm780 mm780 mm780 mm780 mm

Dimensions as recorded.

Gearing

Lower gears help on climbs. Higher gears suit higher speeds.

RPM

RPM = pedal turns per minute.

All published sizes28T · 10–42T · 11-speed
Lowest0.67:1 Highest2.80:1 Total range420%
Estimated speed At 90 RPM Lowest gear5.2 mph Highest gear21.8 mph

Rear tire: 29×2.3.

How it works

Ratio = front teeth ÷ rear teeth. Hub gears also include the hub’s internal ratio. A 400% range means the highest ratio is four times the lowest.

Speeds are estimates from tire size and pedal cadence. Actual speeds vary.

Try other gearing

Parts & serviceability

Find replacement parts

Original specifications
Chain · Original
KMC X11, 11-speed w/ Missing Link™
Cassette · Original
SRAM XG 1150, 11-speed, 10-42t
Retailer offers · Affiliate links
Front tire · Original
Butcher, GRID casing, Gripton compound, 2Bliss Ready, 29 x 2.3" Replacement search: 29x2.3 hookless compatible bicycle tire Before ordering: Check tire approval and pressure for your rim.
More parts (6)
Bottom bracket · Original
Race Face PF30
Crankset · Original
Race Face Aeffect, PF30; chainrings: Steel, 28T
Rear derailleur · Original
SRAM GX, long cage, 11-speed Search: SRAM GX, long cage, 11-speed rear derailleur Before ordering: Confirm whether the drivetrain is mechanical or electronic before ordering.
Retailer offers · Affiliate links
Shifters · Original
SRAM GX, trigger, 11-speed Search: SRAM GX, trigger, 11-speed shifter Before ordering: Confirm whether the drivetrain is mechanical or electronic before ordering.
Stem · Original
Specialized Trail, 3D forged alloy, 4-bolt, 6-degree rise
Rims · Original
Roval Traverse 29, hookless alloy, 29mm internal width, tubeless-ready, 24/28h

Based on the original build. Confirm the model, size and fit before ordering; installed parts may differ. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases.

Bike-specific inspection checklist 23 checks based on 6 archived component groups Open checklistClose checklist
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This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.

Archived: 2018 Specialized Stumpjumper Comp Alloy 29/6Fattie · Mountain · Published sizes: S, M, L, XL, XXL

Archived: Frame: Specialized M5 Aluminum, 29/6Fattie Trail Geometry, PF30 BB, internal cable routing, ManFu link, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 135mm of travel · Fork: RockShox Reba RL, tapered alloy steerer, 51mm offset, external rebound adjust, low speed comp to lockout, 15mm Maxle® Lite thru-axle, custom 15x110 Boost™, 150mm of travel · Aluminum

Archived: Fork: RockShox Reba RL, tapered alloy steerer, 51mm offset, external rebound adjust, low speed comp to lockout, 15mm Maxle® Lite thru-axle, custom 15x110 Boost™, 150mm of travel · Rear shock: RockShox Monarch RT, Rx Trail Tune, AUTOSAG, rebound and 2-position compression adjust, 197x48mm

Archived: Shifters: SRAM GX, trigger, 11-speed · Rear derailleur: SRAM GX, long cage, 11-speed · Crankset: Race Face Aeffect, PF30; chainrings: Steel, 28T · Bottom bracket: Race Face PF30 · Cassette: SRAM XG 1150, 11-speed, 10-42t · Chain: KMC X11, 11-speed w/ Missing Link™

Archived: Brakes: (F) SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200/180mm rotor / (R) SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180/160mm rotor

Archived: Rims: Roval Traverse 29, hookless alloy, 29mm internal width, tubeless-ready, 24/28h · Hubs: (F) Specialized, sealed cartridge bearings, 15x110mm spacing, 24h / (R) Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h · Front tire: Butcher, GRID casing, Gripton compound, 2Bliss Ready, 29 x 2.3" · Rear tire: Purgatory, GRID casing, Gripton compound, 2Bliss Ready, 29 x 2.3"

Controls and contact points

Archived: Handlebar: Specialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 27mm rise, 780mm width · Stem: Specialized Trail, 3D forged alloy, 4-bolt, 6-degree rise · 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 · Saddle: Body Geometry Henge Comp, hollow Cr-Mo rails, 143mm · Pedals: Specialized Platform, Cr-Mo, 9/16" spindle

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Gallery4 images

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Campaign

Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.

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