Rear tire: 27.5×2.3.
Velopedia Bicycle Archive
2021 Specialized Demo Race
Original specifications: geometry for 3 published sizes.
Selling this bike? Get the spec link and selling options
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.
Original buildAluminum
Frameset
| Frame Construction | M5 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 Material | Aluminum |
| 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 |
Drivetrain
| 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 |
| BB Shell Width | 83 mm |
| Cassette | SRAM X01 DH, 7-speed, 10-24t |
| Chain | Sram 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
| 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 |
| Saddle | Body Geometry Henge DH, hollow titanium rails, 130mm |
| Seatpost | Thomson, 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 |
|---|---|
| Rims | Front - Roval 29" Alloy DH, 28mm internal width, 28h, tubeless ready Rear - Roval 27.5" Alloy DH, 28mm internal width, 32h, tubeless ready |
| Spokes | DT Swiss Competition, stainless steel, 14g |
| Front Tire | Butcher BLCK DMND, 29x2.3" |
| Rear Tire | Butcher BLCK DMND, 27.5x2.3" |
Geometry
Frame measurements by size.
Reference drawing
Select an available measurement to locate it on the frame.
All geometry measurements3 sizes · 15 measurements
| Measurement | S2 | S3 | S4 |
|---|---|---|---|
| Seat tube | 394 mm | 420 mm | 420 mm |
| Head tube | 105 mm | 105 mm | 105 mm |
| Head-tube angle | 62.8° | 62.8° | 62.8° |
| Seat-tube angle | 78.2° | 76.8° | 76.8° |
| Bottom-bracket drop | 25 mm | 25 mm | 25 mm |
| Bottom-bracket height | 350 mm | 350 mm | 350 mm |
| Reach | 426 mm | 446 mm | 466 mm |
| Stack | 632 mm | 632 mm | 632 mm |
| Fork offset / rake | 56 mm | 56 mm | 56 mm |
| Front center | 801 mm | 821 mm | 841 mm |
| Trail | 130 mm | 130 mm | 130 mm |
| Seatpost length | 367 mm | 367 mm | 367 mm |
| Crank length | 165 mm | 165 mm | 165 mm |
| Stem length | 50 mm | 50 mm | 50 mm |
| Handlebar width | 800 mm | 800 mm | 800 mm |
Dimensions as recorded.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
RPM = pedal turns per minute.
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 your current gearingChanged tires or gears? Calculate your setup.
Your changes apply to this calculation. The archived build stays unchanged.
| Measure | Original | Your setup |
|---|---|---|
| Lowest ratio | — | — |
| Highest ratio | — | — |
| Total range | — | — |
| Lowest-gear speed | — | — |
| Highest-gear speed | — | — |
Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.
Parts & serviceability
Find replacement parts
7-speed, 10-24t

SRAM X01 DH XG-795 7 Speed Cassette One Color, 10-24
29x2.3"
Replacement search: 29x2.3 bicycle tire Before ordering: Check rim type and tire clearance.27.5x2.3"
Replacement search: 27.5x2.3 bicycle tire Before ordering: Check rim type and tire clearance.More parts (7)Fewer parts
83mm
DUB, carbon, Direct mount ring, 165mm; chainrings: Steel, 30T
7-speed, trigger
trigger, 7-speed
riser bar, 6-degree upsweep, 8-degree backsweep, 30mm rise, 800mm, 35.0mm
alloy, straight, 12-degree clamp
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
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.
Identity and fit
Follow the full used-bike inspection order →Archived: 2021 Specialized Demo Race · Mountain · Published sizes: S2, S3, S4
Frame and fork
Inspect the frame and fork →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
Suspension
Evaluate the suspension →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
Drivetrain
Check drivetrain wear →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
Brakes
Inspect the brakes →Archived: Brakes: (F) SRAM Code RSC, 4-piston caliper, hydraulic disc, 200mm / (R) SRAM Code RSC, 4-piston caliper, hydraulic disc, 200mm
Wheels and tires
Check wheels and tires →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.





