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2021 Specialized Demo Race

Original specifications: geometry for 3 published sizes.

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At a glance

Model year
2021
Category
Mountain
Original MSRP
$7,000.00
Sizes
S2, S3, S4
Colors
Gloss Brushed / Red Tint / White
Geometry
3 manufacturer sizes
In this record
21 specifications · 5 archived images · original MSRP · geometry
Archive ID
900004375
Model history 3 other years

Checking your bike’s model year? Compare its frame details and original finish with nearby years.

Published colors
Gloss Brushed / Red Tint / White
Frame
Aluminum

Colors can vary by market and components can be replaced. These are identification clues, not proof of the frame’s year.

Campaign
Original buildAluminum

Manufacturer catalog

Published sizes and colors

3 sizes · 1 color

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

Published sizes

S2S3S4

Published colors

Gloss Brushed / Red Tint / White

Frameset

Frame ConstructionM5 alloy, Style-Specific DH Geometry, horst pivot flip chip for 27.5 or 29 rear wheel, BSA threaded BB, full internal cable routing with option for full external brake, 148mm rear spacing, sealed cartridge bearing pivots, replaceable derailleur hanger, 200mm of travel
Frame MaterialAluminum
ForkRockShox BoXXer Ultimate 29, Charger 2.1 Damper, DH DebonAir spring, short crown, 20x110mm thru-axle, 56mm offset, 200mm of travel
Rear ShockRockShox Super Deluxe Ultimate DH Coil, external low speed compression, external rebound adjust, Trunnion mount, 225x75

Drivetrain

ShiftersSRAM X01 DH, trigger, 7-speed
Rear DerailleurSRAM X01 DH, 7-speed, trigger
CranksetSRAM X01 DH, DUB, carbon, Direct mount ring, 165mm; chainrings: Steel, 30T
Bottom BracketSRAM DUB, 83mm
BB Shell Width83 mm
CassetteSRAM X01 DH, 7-speed, 10-24t
ChainSram PC1130 w/ Powerlink, 11-speed

Brakes

Brakes(F) SRAM Code RSC, 4-piston caliper, hydraulic disc, 200mm / (R) SRAM Code RSC, 4-piston caliper, hydraulic disc, 200mm

Cockpit & Contact Points

HandlebarRoval Traverse SL Carbon, riser bar, 6-degree upsweep, 8-degree backsweep, 30mm rise, 800mm, 35.0mm
StemDescendant 35mm Direct Mount Stem, 50mm length
SaddleBody Geometry Henge DH, hollow titanium rails, 130mm
SeatpostThomson, alloy, straight, 12-degree clamp

Wheels & Tires

Hubs(F) Alloy, sealed cartridge bearings, 20x110mm, 28h / (R) DT Swiss 350, SRAM XD freehub, 6-bolt disc, high-low flange, sealed cartridge bearings, 12x148mm spacing, 32h
RimsFront - Roval 29" Alloy DH, 28mm internal width, 28h, tubeless ready Rear - Roval 27.5" Alloy DH, 28mm internal width, 32h, tubeless ready
SpokesDT Swiss Competition, stainless steel, 14g
Front TireButcher BLCK DMND, 29x2.3"
Rear TireButcher BLCK DMND, 27.5x2.3"

Geometry

3 sizes · 15 measurements

Frame measurements by size.

All geometry measurements3 sizes · 15 measurements
MeasurementS2S3S4
Seat tube394 mm420 mm420 mm
Head tube105 mm105 mm105 mm
Head-tube angle62.8°62.8°62.8°
Seat-tube angle78.2°76.8°76.8°
Bottom-bracket drop25 mm25 mm25 mm
Bottom-bracket height350 mm350 mm350 mm
Reach426 mm446 mm466 mm
Stack632 mm632 mm632 mm
Fork offset / rake56 mm56 mm56 mm
Front center801 mm821 mm841 mm
Trail130 mm130 mm130 mm
Seatpost length367 mm367 mm367 mm
Crank length165 mm165 mm165 mm
Stem length50 mm50 mm50 mm
Handlebar width800 mm800 mm800 mm

Dimensions as recorded.

Gearing

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

RPM

RPM = pedal turns per minute.

All published sizes30T · 10–24T
Lowest1.25:1 Highest3.00:1 Total range240%
Estimated speed At 90 RPM Lowest gear9.2 mph Highest gear22.2 mph

Rear tire: 27.5×2.3.

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

Try your current gearingChanged tires or gears? Calculate your setup.

Your changes apply to this calculation. The archived build stays unchanged.

Your gearing setup

Use up to three front tooth counts, separated by /. For one rear sprocket, enter the same count twice.

On a tire marked 32-622, width is 32 mm and rim diameter is 622 mm. Use the rear tire on mixed-wheel bikes. Leave tire fields empty to compare ratios only.

Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.

Parts & serviceability

Find replacement parts

Original specifications
Cassette · Original
SRAM X01 DH

7-speed, 10-24t

Retailer offers
Front tire · Original
Butcher BLCK DMND

29x2.3"

Replacement search: 29x2.3 bicycle tire Before ordering: Check rim type and tire clearance.
Rear tire · Original
Butcher BLCK DMND

27.5x2.3"

Replacement search: 27.5x2.3 bicycle tire Before ordering: Check rim type and tire clearance.
More parts (7)Fewer parts
Bottom bracket · Original
SRAM DUB

83mm

Crankset · Original
SRAM X01 DH

DUB, carbon, Direct mount ring, 165mm; chainrings: Steel, 30T

Rear derailleur · Original
SRAM X01 DH

7-speed, trigger

Shifters · Original
SRAM X01 DH

trigger, 7-speed

Handlebar · Original
Roval Traverse SL Carbon

riser bar, 6-degree upsweep, 8-degree backsweep, 30mm rise, 800mm, 35.0mm

Seatpost · Original
Thomson

alloy, straight, 12-degree clamp

Rims · Original
Front - Roval 29" Alloy DH

28mm internal width, 28h, tubeless ready Rear - Roval 27.5" Alloy DH, 28mm internal width, 32h, tubeless ready

Based on the original build. Check fit and installed parts before ordering. Affiliate links may earn Velopedia a commission. As an Amazon Associate I earn from qualifying purchases.

Service essentials

Start with the original build, then check what is fitted to your bike today.

Front tire
Butcher BLCK DMND, 29x2.3"Check the fitted tire’s size and rim type; replacements may differ from the original.
Rear tire
Butcher BLCK DMND, 27.5x2.3"Read the rear tire’s size marking. Do not assume it matches the front.
Drivetrain
Not confirmed in this recordMatch the chain or belt to the installed drivetrain family; speed count alone is not a fit guarantee.
Seatpost diameter
Not confirmed in this recordCheck the diameter stamped on the post. A seat-clamp diameter is a different measurement.
Bottom bracket / shell
SRAM DUB, 83mm · 83 mmConfirm shell type and width, crank interface, and spindle length or spacers before ordering.
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: 2021 Specialized Demo Race · Mountain · Published sizes: S2, S3, S4

Archived: Frame: Aluminum · Fork: RockShox BoXXer Ultimate 29, Charger 2.1 Damper, DH DebonAir spring, short crown, 20x110mm thru-axle, 56mm offset, 200mm of travel

Archived: Fork: RockShox BoXXer Ultimate 29, Charger 2.1 Damper, DH DebonAir spring, short crown, 20x110mm thru-axle, 56mm offset, 200mm of travel · Rear shock: RockShox Super Deluxe Ultimate DH Coil, external low speed compression, external rebound adjust, Trunnion mount, 225x75

Archived: Shifters: SRAM X01 DH, trigger, 7-speed · Rear derailleur: SRAM X01 DH, 7-speed, trigger · Crankset: SRAM X01 DH, DUB, carbon, Direct mount ring, 165mm; chainrings: Steel, 30T · Bottom bracket: SRAM DUB, 83mm · Cassette: SRAM X01 DH, 7-speed, 10-24t · Chain: Sram PC1130 w/ Powerlink, 11-speed

Archived: Brakes: (F) SRAM Code RSC, 4-piston caliper, hydraulic disc, 200mm / (R) SRAM Code RSC, 4-piston caliper, hydraulic disc, 200mm

Archived: Rims: Front - Roval 29" Alloy DH, 28mm internal width, 28h, tubeless ready Rear - Roval 27.5" Alloy DH, 28mm internal width, 32h, tubeless ready · Hubs: (F) Alloy, sealed cartridge bearings, 20x110mm, 28h / (R) DT Swiss 350, SRAM XD freehub, 6-bolt disc, high-low flange, sealed cartridge bearings, 12x148mm spacing, 32h · Front tire: Butcher BLCK DMND, 29x2.3" · Rear tire: Butcher BLCK DMND, 27.5x2.3"

Controls and contact points

Archived: Handlebar: Roval Traverse SL Carbon, riser bar, 6-degree upsweep, 8-degree backsweep, 30mm rise, 800mm, 35.0mm · Stem: Descendant 35mm Direct Mount Stem, 50mm length · Seatpost: Thomson, alloy, straight, 12-degree clamp · Saddle: Body Geometry Henge DH, hollow titanium rails, 130mm

Before and during the test ride

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Gallery5 images

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

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