Velopedia Bicycle Archive

2018 Specialized Stumpjumper Comp Alloy 27.5

Original specifications: geometry for 4 published sizes.

Share owner experience

Selling this bike? Get the spec link and selling options

At a glance

Model year
2018
Category
Mountain
Original MSRP
$2,800.00
Sizes
S, M, L, XL
Colors
Gloss Hyper/Mint Clean, Satin Black/White Clean
Geometry
4 manufacturer sizes
In this record
23 specifications · 2 archived images · original MSRP · geometry
Archive ID
900003398
Model history 1 other year
Campaign
Original buildAluminum

Manufacturer catalog

Published sizes and colors

4 sizes · 2 colors

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

Published sizes

SMLXL

Published colors

Gloss Hyper/Mint CleanSatin Black/White Clean

Frameset

Frame ConstructionSpecialized 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
Frame MaterialAluminum
ForkFOX FLOAT Rhythm 34 27.5, 44mm offset, 2-position, tapered alloy steerer, 15x110mm 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, 30T
Bottom BracketRace Face PF30
BB Shell Width24 mm
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) Stout Pro 110 disc, alloy sealed cartridge bearings, 15x110mm spacing, 24h / (R) Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h
RimsRoval Traverse 27.5, hookless alloy, 29mm inner width, tubeless ready, 24/28h
SpokesDT Swiss Industry, stainless, 3-cross, 2.0"
Front TireButcher, GRID casing, Gripton compound, 2Bliss Ready, 27.5 x 2.6"
Rear TireButcher, GRID casing, Gripton compound, 2Bliss Ready, 27.5 x 2.6"

Geometry

4 sizes · 20 measurements

Frame measurements by size.

All geometry measurements4 sizes · 20 measurements
MeasurementSMLXL
Seat tube380 mm410 mm455 mm505 mm
Effective top tube570 mm595 mm627 mm660 mm
Head tube105 mm110 mm140 mm155 mm
Head-tube angle65.5°65.5°65.5°65.5°
Seat-tube angle75.3°75°74.6°74.2°
Chainstay / rear center432 mm432 mm432 mm432 mm
Wheelbase1157 mm1179 mm1212 mm1243 mm
Bottom-bracket drop21 mm21 mm21 mm21 mm
Bottom-bracket height336 mm336 mm336 mm336 mm
Reach415 mm435 mm455 mm480 mm
Stack592 mm596 mm623 mm637 mm
Standover height752 mm757 mm769 mm770 mm
Fork offset / rake46 mm46 mm46 mm46 mm
Front center726 mm748 mm780 mm812 mm
Trail112 mm112 mm112 mm112 mm
Fork length / axle-to-crown542 mm542 mm542 mm542 mm
Seatpost length376 mm438 mm438 mm438 mm
Crank length170 mm170 mm170 mm170 mm
Stem length45 mm45 mm45 mm45 mm
Handlebar width780 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 sizes30T · 10–42T · 11-speed
Lowest0.71:1 Highest3.00:1 Total range420%
Estimated speed At 90 RPM Lowest gear5.4 mph Highest gear22.7 mph

Rear tire: 27.5×2.6.

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, 27.5 x 2.6" Replacement search: 27.5x2.6 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, 30T
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 27.5, hookless alloy, 29mm inner 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
0 of 23 checked Progress stays in this browser for this bike.

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 27.5 · Mountain · Published sizes: S, M, L, XL

Archived: 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 · Fork: FOX FLOAT Rhythm 34 27.5, 44mm offset, 2-position, tapered alloy steerer, 15x110mm Boost™, 150mm of travel · Aluminum

Archived: Fork: FOX FLOAT Rhythm 34 27.5, 44mm offset, 2-position, tapered alloy steerer, 15x110mm 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, 30T · 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 27.5, hookless alloy, 29mm inner width, tubeless ready, 24/28h · Hubs: (F) Stout Pro 110 disc, alloy sealed cartridge bearings, 15x110mm spacing, 24h / (R) Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h · Front tire: Butcher, GRID casing, Gripton compound, 2Bliss Ready, 27.5 x 2.6" · Rear tire: Butcher, GRID casing, Gripton compound, 2Bliss Ready, 27.5 x 2.6"

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

Before and during the test ride

Follow the full used-bike inspection order →

My Garage

Velopedia

Enter your email and Velopedia will send a private sign-in link. No password required.

Have you owned this bike?Help preserve its real-world history by sharing your owner experience.

Share the details that would help another rider understand how this model fits, rides and holds up over time. Velopedia reviews every contribution before publication.

Add fit, maintenance and buyer detailsOptional · five additional fields

Your contribution goes directly to Velopedia’s private review queue. We’ll email an optional confirmation link plus a private edit and withdrawal link, but you do not need to confirm your email before an administrator can review or approve the submission.

Already contributed? Send me a fresh private edit link

For privacy, Velopedia shows the same confirmation whether or not an experience exists.

Gallery2 images

Checking current listings…

Campaign

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

Scroll to Top