Specialized Demo 8 II Alloy

Name: Specialized Demo 8 II Alloy
Brand: Specialized

2017 MountainDownhill Manufacturer page

Travel: 200 / 200 mm Fork / rear shock
Wheels: 27.5″
Drivetrain: 1 × 10 36t / 11–36t
Gear range: 327%
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

Short
MD
Long
X-Long

The manufacturer did not publish rider heights for these sizes.

Components

18 of 21 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

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 Not identified

Suspension

2 parts

Drivetrain

6 parts

Bottom bracket
- SRAM BB30
Cassette
- SRAM PG-1030 10 speeds 11–36t
PG-1030
Chain
- SRAM PC-1031 10 speeds
PC-1031
Crankset
- SRAM X0 36t
Rear derailleur
- SRAM X0 TYPE 2.1 10 speeds
Shifters
- SRAM X9

Brakes

1 part

Brakes
- Avid Code

Wheels and tires

5 parts

Front hub
- Specialized
Rear hub
- DT Swiss 350
Rims
- Roval
Spokes
- DT Swiss
Tires

Front: Butcher, DH casing, 650bx2.5"", 60TPI, wire bead, Rear: Slaughter, DH casing, 650bx2.3"", 60TPI, wire bead Not identified

Cockpit and contact points

6 parts

Grips
- Specialized
Handlebar
- Specialized
Pedals
- Specialized
Saddle
- Ritchey Comp
Seatpost

Thomson, alloy, straight, 12-degree clamp Not identified
Stem
- Specialized

Sizes and geometry

4 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size MD

Table

Reach 420mm

Stack 614mm

Wheelbase 1208mm

Head angle 63.5°

Seat angle 74.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	395	420	440	460
Stackmm	614	614	614	614
Top tube lengthmm	571	596	616	636
Seat tube lengthmm	367	367	367	367
Head tube lengthmm	105	105	105	105
Head tube angle	63.5°	63.5°	63.5°	63.5°
Seat tube angle	74°	74°	74°	74°
Chainstay lengthmm	430	430	430	430
Wheelbasemm	1183	1208	1228	1248
Front centermm	754	779	799	819
Bottom bracket dropmm	12	12	12	12
Bottom bracket heightmm	342	342	342	342
Standover heightmm	698	698	698	698
Fork rakemm	52	52	52	52
Trailmm	118	118	118	118
Stack/reach ratio	1.55	1.46	1.40	1.34
Suspension and parts
Crank lengthmm	165	165	165	165
Handlebar widthmm	800	800	800	800
Stem lengthmm	45	45	45	45
Seatpost lengthmm	367	367	367	367

Not published by the manufacturer: Front travel, Rear travel, Stem angle and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Aluminum

Suspension

Suspension configuration: Full suspension
Front travel: 200 mm
Rear travel: 200 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 36
Largest chainring: 36
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 36
Lowest gear: 27.5 in
Highest gear: 90.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BB30
Fork spring: Coil
Tire width: 2.5″
Wheel material: Aluminum
Wheel size: 27.5″

Technical analysis

4 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Front travel

200 mm

This value is within the central range for this class.

Cohort: Mountain / Downhill Model year: 2017
Sample: 40 bicycles with this information
Coverage: 85.1% of the class

Rear travel

200 mm

This value is within the central range for this class.

Cohort: Mountain / Downhill Model year: 2017
Sample: 38 bicycles with this information
Coverage: 80.8% of the class

Lowest gear

27.5 gear inches

This value is below the central range for this class.

Cohort: Mountain / Downhill Model year: 2017
Sample: 39 bicycles with this information
Coverage: 82.9% of the class

Highest gear

90.0 gear inches

This value is within the central range for this class.

Cohort: Mountain / Downhill Model year: 2017
Sample: 39 bicycles with this information
Coverage: 82.9% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 10.5 km/h
Highest gear: 34.5 km/h

Total gear range 327%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 27.5–90.0 gear inches
Class reference (p10–p90): 33.4–95.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Downhill Model year: 2017
Lowest gear: 39 bicycles with this information, 82.9% of the class
Highest gear: 39 bicycles with this information, 82.9% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2017 builds

Differences across 2017 builds
Specification	This bicycle Specialized Demo 8 II Alloy	Specialized Demo 8 I Alloy	Specialized Demo 8 I Carbon	Specialized S-Works Demo 8
Frame
Frame material	Aluminum	Aluminum	Carbon	Carbon
Drivetrain
Smallest chainring	36	32	36	34
Largest chainring	36	32	36	34
Rear sprockets	10	10	7	7
Smallest sprocket	11	11	11	10
Largest sprocket	36	36	25	24
Lowest gear	27.5 in	24.4 in	39.6 in	39.0 in
Highest gear	90.0 in	80.0 in	90.0 in	93.5 in
Other specifications
Rear shock spring	Not informed	Coil	Not informed	Not informed