Estimate uses the published front tire 26×2.2 as a proxy, corroborated by the wheel size. Rear tire size is not published or verified. Approximate circumference; actual rollout varies with tire and pressure. Theoretical, not a maximum achievable speed.
Velopedia Bicycle Archive
2005 Specialized Hardrock Sport Disc
Original specifications: Shimano Acera · 8-speed · mechanical rear derailleur · 26" wheels.
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At a glance
- Model year
- 2005
- Category
- Mountain
- Original MSRP
- $440.00
- Sizes
- XS, S, M, L, XL, XXL
- Colors
- Blue, Green, Silver
- In this record
- 26 specifications · archived image · original MSRP
- Archive ID
- 10606
Model history 6 other years
Original buildA1 Premium Aluminum · Mountain Mix · 26" wheels
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | A1 Premium Aluminum |
| Fork | RST Gila Plus, 100mm |
| Fork Material | Aluminum/magnesium, single crown |
Drivetrain
| Component Group | Mountain Mix |
|---|---|
| Shifters | Shimano Altus |
| Front Derailleur | Shimano Acera, bottom-pull/clamp-on 31.8mm |
| Rear Derailleur | Shimano Acera |
| Crankset | TruVativ X-Flow, 22/32/42 teeth |
| Bottom Bracket | TruVativ, 113mm spindle |
| BB Shell Width | 68mm English |
| Rear Cogs | 8-speed, 11 - 32 teeth |
| Chain | Shimano CN-IG31, 1/2 x 3/32" |
| Pedals | Steel cage |
Brakes
| Brakes | Tektro IO disc brakes, Shimano Altus levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/8" threadless sealed cartridge |
|---|---|
| Handlebar | Aluminum |
| Stem | Specialized Mobius |
| Saddle | Specialized BG Sport ATB |
| Seatpost | Aluminum micro-adjust, 30.9mm diameter |
Wheels & Tires
| Hubs | Joytech QR |
|---|---|
| Rims | Alex DH-20, 36-hole |
| Spokes | Stainless steel, 14ga. (2.0mm) straight gauge |
| Spoke Nipples | Brass nipples |
| Front Tire | 26 x 2.20" Specialized Enduro Sport |
| Wheel Size | 26" wheels |
Gearing
Lower ratios provide more mechanical advantage for climbing. Higher ratios turn the rear wheel farther with each crank revolution.
Parts & serviceability
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Bike-specific inspection checklist 21 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: 2005 Specialized Hardrock Sport Disc · Mountain bike, front suspension · Published sizes: XS, S, M, L, XL, XXL
Frame and fork
Inspect the frame and fork →Archived: Frame: TIG-welded · Fork: RST Gila Plus, 100mm · Aluminum/magnesium, single crown
Suspension
Evaluate the suspension →Archived: Fork: RST Gila Plus, 100mm
Drivetrain
Check drivetrain wear →Archived: Group: Mountain Mix · Shifters: Shimano Altus · Front derailleur: Shimano Acera, bottom-pull/clamp-on 31.8mm · Rear derailleur: Shimano Acera · Crankset: TruVativ X-Flow, 22/32/42 teeth · Bottom bracket: TruVativ, 113mm spindle · Rear cogs: 8-speed, 11 - 32 teeth · Chain: Shimano CN-IG31, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Tektro IO disc brakes, Shimano Altus levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 26" wheels · Rims: Alex DH-20, 36-hole · Hubs: Joytech QR · Front tire: 26 x 2.20" Specialized Enduro Sport
Controls and contact points
Archived: Headset: 1 1/8" threadless sealed cartridge · Handlebar: Aluminum · Stem: Specialized Mobius · Seatpost: Aluminum micro-adjust, 30.9mm diameter · Saddle: Specialized BG Sport ATB · Pedals: Steel cage
Before and during the test ride
Follow the full used-bike inspection order →Have you owned this bike?Help document firsthand fit, ride and maintenance details that may no longer be available.
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.




