Estimate uses the published front tire 26×2.1 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
2008 Specialized Gromrock
Original specifications: Mountain Mix drivetrain · 26" wheels.
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At a glance
- Model year
- 2008
- Category
- Mountain
- Original MSRP
- $480.00
- Sizes
- 12.5"
- Colors
- Charcoal/black
- In this record
- 26 specifications · archived image · original MSRP
- Archive ID
- 24038
Original buildA1 premium aluminum · Mountain Mix · 26" wheels
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | A1 premium aluminum |
| Fork | SR Suntour SF7-XCM, 80mm travel |
| Fork Material | Aluminum/steel, single crown crown |
Drivetrain
| Component Group | Mountain Mix |
|---|---|
| Shifters | SRAM 3.0 Comp Grip Shift |
| Front Derailleur | Shimano Altus FD-M310-6, top swing |
| Rear Derailleur | SRAM 3.0 |
| Crankset | SR Suntour XCM-T312, 22/32/44 teeth |
| Bottom Bracket | Shimano BB-ES25, 118mm spindle |
| BB Shell Width | 68mm |
| Rear Cogs | 8-speed, 11 - 32 teeth |
| Chain | KMX X8, 1/2 x 3/32" |
| Pedals | Steel cage/composite body |
Brakes
| Brakes | Tektro IOX w/6" rotor brakes, Tektro Jr. levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/8" threadless |
|---|---|
| Handlebar | Alloy riser |
| Handlebar Extensions | Not included |
| Stem | Specialized 3D forged alloy 25.4mm |
| Saddle | Specialized Kids ATB w/kevlar sides |
| Seatpost | Specialized alloy two bolt, 30.9mm diameter |
Wheels & Tires
| Hubs | Specialized Hi-Lo Disc |
|---|---|
| Rims | Specialized/Alex HRD 24, 32-hole |
| Spokes | Stainless steel, 15ga. (1.8mm) straight gauge |
| Front Tire | 26 x 2.1" Specialized Resolution wire |
| 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 20 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: 2008 Specialized Gromrock · Mountain bike, front suspension · Published sizes: 12.5"
Frame and fork
Inspect the frame and fork →Archived: Frame: TIG-welded · Fork: SR Suntour SF7-XCM, 80mm travel · Aluminum/steel, single crown crown
Suspension
Evaluate the suspension →Archived: Fork: SR Suntour SF7-XCM, 80mm travel
Drivetrain
Check drivetrain wear →Archived: Group: Mountain Mix · Shifters: SRAM 3.0 Comp Grip Shift · Front derailleur: Shimano Altus FD-M310-6, top swing · Rear derailleur: SRAM 3.0 · Crankset: SR Suntour XCM-T312, 22/32/44 teeth · Bottom bracket: Shimano BB-ES25, 118mm spindle · Rear cogs: 8-speed, 11 - 32 teeth · Chain: KMX X8, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Tektro IOX w/6" rotor brakes, Tektro Jr. levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 26" wheels · Rims: Specialized/Alex HRD 24, 32-hole · Hubs: Specialized Hi-Lo Disc · Front tire: 26 x 2.1" Specialized Resolution wire
Controls and contact points
Archived: Headset: 1 1/8" threadless · Handlebar: Alloy riser · Stem: Specialized 3D forged alloy 25.4mm · Seatpost: Specialized alloy two bolt, 30.9mm diameter · Saddle: Specialized Kids ATB w/kevlar sides · Pedals: Steel cage/composite body
Before and during the test ride
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.