Specialized Demo 8 I

2015 MountainDownhill Manufacturer page

Travel: 200 / 200 mm Fork / rear shock
Wheels: 27.5″
Drivetrain: 1 × 10 36t / 11–25t
Gear range: 227%
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

MD
Long
X-Long

The manufacturer did not publish rider heights for these sizes.

Components

21 of 23 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 manipulated alloy, 650b S3 Geometry, 1.5"" forged headtube, 135mm rear spacing, compact race design, ISCG '05 mount, cartridge bearing rear shock mount, rear derailleur protector, 200mm travel Not identified

Suspension

2 parts

Drivetrain

6 parts

Brakes

2 parts

Wheels and tires

5 parts

Cockpit and contact points

7 parts

Grips
- Specialized
Handlebar
- Specialized
Headset

1-1/2"" semi-integrated for 1-1/8"" steerer, cartridge bearings Not identified
Pedals
- Specialized
Saddle
- Ritchey Comp
Seatpost
- Specialized
Stem
- Specialized

Sizes and geometry

3 sizes Open in the geometry plotter

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

Size Long

Table

Reach 439mm

Stack 616mm

Wheelbase 1228mm

Head angle 64.3°

Seat angle 76.8°

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 3 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	419	439	456
Stackmm	613	616	616
Top tube lengthmm	573	594	612
Seat tube lengthmm	393	417	417
Head tube lengthmm	108	108	108
Head tube angle	64.3°	64.3°	64.3°
Seat tube angle	76.8°	76.8°	76.8°
Chainstay lengthmm	430	430	430
Wheelbasemm	1207	1228	1235
Front centermm	777	798	805
Bottom bracket dropmm	-2	-2	-2
Bottom bracket heightmm	357	357	357
Standover heightmm	721	730	736
Fork rakemm	56	55	46
Trailmm	109	110	120
Stack/reach ratio	1.46	1.40	1.35
Suspension and parts
Crank lengthmm	165	165	165
Handlebar widthmm	780	780	780
Stem lengthmm	45	45	45
Seatpost lengthmm	300	300	300

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: 25
Lowest gear: 39.6 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: PF30
Fork spring: Coil
Rear shock spring: Coil
Tire width: 2.5″
Wheel material: Aluminum
Wheel size: 27.5″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 15.2 km/h
Highest gear: 34.5 km/h

Total gear range 227%

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: 39.6–90.0 gear inches

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 2015 builds
Specification	This bicycle Specialized Demo 8 I	Specialized Demo 8 II	Specialized S-Works Demo 8
Frame
Frame material	Aluminum	Aluminum	Carbon
Drivetrain
Smallest chainring	36	30	Not informed
Largest chainring	36	30	Not informed
Rear sprockets	10	7	7
Smallest sprocket	11	9	10
Largest sprocket	25	25	24
Lowest gear	39.6 in	33.0 in	Not informed
Highest gear	90.0 in	91.7 in	Not informed
Other specifications
Bottom bracket standard	PF30	PF30	BB30
Rear shock spring	Coil	Not informed	Not informed