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2017 Specialized

Demo 8 II Alloy

A 27.5″ aluminum frame full suspension downhill bike with ultra high-end components.
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FrameAluminum
SuspensionFull, 200 / 200mm
ForkRockShox BoXXer
ShockÖhlins
Wheels27.5″ Aluminum
Drivetrain1 × 10
GroupsetX0, X9
BrakesSRAM Guide RS Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Demo 8 II Alloy
Other Downhill bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

27 mph

Demo 8 II Alloy

26 mph

Similar Bikes

Highest gear

(descending)

Reviews

Summary

The Specialized Demo is a downhill bike that excels in gnarly terrain with its supple suspension and planted handling, making it a favorite for steep and technical tracks. However, it faces criticism for its pedaling efficiency and suspension that can feel wallowy or bottom out under hard use. The bike's design, including its asymmetric frame and low bottom bracket, contributes to its confident ride but can also lead to some handling quirks.

Pros
  • Super-supple, traction-rich suspension isolates your feet from the roughest terrain

  • Low bottom bracket and short chainstays make for a connected, planted feel in steep tech and turns

  • Asymmetric frame design for easier access to the shock and cool looks

  • Impeccable finish and true internal routing leaves the bike rattle free

  • Great geometry and progressive sizing mirrors the more expensive carbon design

Cons
  • Linear suspension can hamper front wheel grip when cornering hard

  • Pedalling efficiency is compromised

  • Feet dragging on the insides of ruts due to low bottom bracket

  • Suspension is easy to bottom out

  • Basic fork internals and components are lacking compared to competitors

Key Quotes
Awesome in gnarly terrain, but a little wallowy when pedalling or cornering hard
BikeRadar logoBikeRadar
A bike that shines on pure downhill
Dirt Mountainbike logoDirt Mountainbike
The Specialized Demo 8.1 Alloy looks just as good as its carbon counterpart, but costs 50 per cent less.
MBR logoMBR
Sometimes things just click, as they did on our very first run with the Specialized Demo 8.
Vital MTB logoVital MTB

Feedback?

View all reviews

Vital MTB
2018 Specialized Demo 8 S-Works Bike

Jan 2019 · Bturman

The highly regarded Demo 8 offers immediate confidence and a smooth ride.

Read Review

BikeRadar
Specialized Demo 8 I Alloy review

Sep 2018 · Seb Stott

Awesome in gnarly terrain, but a little wallowy when pedalling or cornering hard. Buy if you want a bike for the roughest, steepest, most technical tracks around

Highs
  • Super-supple, traction-rich suspension isolates your feet from the roughest terrain

  • Low bottom bracket and short chainstays make for a connected, planted feel in steep tech and turns

Lows
  • Linear suspension can hamper front wheel grip when cornering hard, especially on the XL size

Read Review

Dirt Mountainbike
Specialized S-Works Demo 8

Apr 2017 · Smurf

2015 downhill bike of they year, 2016 downhill bike of the year, 2017…? The Specialized S-Works Demo 8 is bike we chose to run at the World Championships simply because we couldn’t find a frame that beat it. We’ve now got a National Championships and Worlds podium on the beast that probably prove we were […]

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MBR
Specialized Demo 8.1 Alloy (2017) first ride - MBR

Jan 2017 · Alan Muldoon

Great geometry and progressive sizing give the Specialized Demo 8 Alloy an edge. Everything about the Demo’s parts package is pretty much bombproof.

Highs
  • Great geometry and progressive sizing give the Demo 8 an edge

Lows
  • Basic fork internals put the brakes on an otherwise rapid package

Read Review

Mountain Bike Action
Bike Test: Specialized Demo 8 Carbon

Dec 2015 · McCoy

The Specialized Demo 8 Carbon is worth a look for serious downhill riders and racers

Read Review

MTB Mag
First Ride : Specialized Demo Carbon 27.5"

Aug 2014 · Ian Collins

During Crankworx in Whistler, I had the fortunate opportunity to take a new Specialized Demo Carbon 27.5” bike out for a day and gather some thoughts on the bold, cutting edge new design. While one day certainly isn’t enough time to do a full length review on a complete DH bike, if there was any single place to ride for JUST one day and gather as much feedback as possible it would be in Whistler. demo test session from MTB MAG on Vimeo. At 6′ tall, I was pretty dead set on riding a long. Why did I call it

Read Review

Mountain Flyer
2015 Specialized Demo Carbon - First Impressions

Aug 2014

All New Specialized FSR Design with Concentric Bottom Bracket Introduced at Crankworx Whistler, 27.5-inch wheels are infiltrating the DH scene for 2015, including one of the industry’s last holdouts of the ‘tweener wheel size in general - Specialized. In addition to their recent 27.5-inch Enduro model introduction, next year’s Demo will now be available with 27.5” wheels, too.

Read Review

Canadian Cycling Magazine
Specialized releases S-works Demo 8 & Demo 8 Carbon

Aug 2014 · Charles Bryer

Specialized’s latest release is the Demo 8 Carbon – a downhill bike designed to have a lower centre of gravity and improved stiffness according to

Read Review

Geometry
Specs
Build
Frame

M5 alloy, S3 Geometry, carbon link and seatstay, BB30, full internal cable routing, 135mm dropouts, lipped and sealed cartridge bearing pivots, replaceable derailleur hanger, 200mm of travel

BB StandardBB30, 83mm, Press Fit

Fork

RockShox BoXXer Team 650b, coil spring, S: Extra soft spring, M: Soft spring, L: Medium spring, XL: Firm spring, 200mm of travel, charger damper, compression adjust, rebound adjust, alloy steerer, 48mm offset, Maxle Lite DH

Travel200mm

Spring TypeCoil

Shock

Custom Öhlins TTX, Twin-Tube desgin, high and low-speed compression adjust, rebound adjust, 9.5x3""

Travel200mm

Bottom Bracket

SRAM BB30, 83mm

Stem

Specialized P.Series MTB, forged alloy, 4-bolt, 45mm

Handlebar

Specialized DH, 7050 alloy, 8-degree backsweep, 6-degree upsweep, 25mm rise, 800mm, 31.8mm

Saddle

Body Geometry Phenom Comp, hollow Cr-Mo rails, 143mm

Seatpost

Thomson, alloy, straight, 12-degree clamp

TypeRigid

Pedals

Specialized Bennies, 6061 alloy body, sealed cartridge bearings, 4.5mm removable pins

Grips

Specialized Sip Grip, half-waffle, S/M: regular thickness, L/XL: XL thickness

Groupset
Rear Derailleur

SRAM X0 Type 2.1, short cage, 10-speed

Crank

SRAM X0 DH, BB30, carbon arms, triple base w/Gamut bashguard 165mm, SRAM 36T

Shifters

SRAM X9, 10-speed, trigger

Cassette

SRAM PG-1030, 10-speed, 11-36t

Chain

SRAM PC-1031, 10-speed w/PowerLink

Brakes

Front: SRAM Guide RS lever, hydraulic disc, organic pads, Code calipers, 200mm rotor, Rear: SRAM Guide RS, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180mm rotor

TypeSRAM Guide RS Hydraulic Disc

Wheels
Rims

Roval 650b, alloy, 24mm inner width, 32h

Spokes

DT Swiss Industry, stainless, 3x, 2.0""

Front Hub

Specialized disc, alloy flange & disc mount, sealed cartridge bearings, 20mm thru-axle, 32h

Rear Hub

Custom DT Swiss 350, 135mm spacing, SRAM XD driver, 54T ratchet, 12mm thru-axle, 32h

Tires

Front: Butcher, DH casing, 650bx2.5"", 60TPI, wire bead, Rear: Slaughter, DH casing, 650bx2.3"", 60TPI, wire bead

Rider Notes
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First added November 6

Last updated November 6

Not listed for 2,411 days