Velopedia Bicycle Archive
2011 Rocky Mountain Reaper 24
Original specifications: Shimano Altus · 8-speed rear derailleur · 24" wheels.
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At a glance
Archive #23684- Model year
- 2011
- Category
- Kids
- Sizes
- 12.5"
- Colors
- Black
- In this record
- 25 specifications · archived image
Model history 4 other years
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Identification clues
2011 archived details
- Published colors
- Black
- Frame
- 6061 aluminum
- Original equipment
- Mountain Mix
Clues, not proof of model year. Colors vary and components may have been replaced.
Original build6061 aluminum · Mountain Mix · 24" wheels
Frameset
| Frame Construction | Aluminum |
|---|---|
| Frame Material | 6061 aluminum |
| Fork | Suntour XCR |
Drivetrain
| Component Group | Mountain Mix |
|---|---|
| Shifters | Shimano ST-EF51 |
| Front Derailleur | Shimano TX50 |
| Rear Derailleur | Shimano Altus |
| Crankset | Truvativ Ruktion, 32/22t teeth |
| Bottom Bracket | Truvativ Howitzer XR |
| Cassette | Shimano HG-30 |
| Rear Cogs | 8-speed, 11 - 32 teeth |
| Chain | Shimano HG40 |
| Pedals | RMB Jr Flat |
Brakes
| Brakes | Promax DSK7-20 Mechanical Disc 160mm Rotor brakes, Shimano EF51 levers |
|---|
Cockpit & Contact Points
| Headset | FSA ZST-10 |
|---|---|
| Handlebar | RMB AM |
| Handlebar Extensions | Not included |
| Stem | RMB FR 10-degree 40mm |
| Saddle | RMB FR JR. |
| Seatpost | RMB XC, 27.2mm diameter |
Wheels & Tires
| Hubs | RMB XC Disc |
|---|---|
| Rims | Alex DM-18 |
| Spokes | Stainless stainless |
| Front Tire | 24" Kenda Kinetic |
| Wheel Size | 24" wheels |
No specifications match. Try a component name or clear your search.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
RPM = pedal turns per minute.
Speed unavailable: wheel or tire size is missing or unclear.
Add your rear tire size to calculate speedHow 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.
Gearing results
| 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

SRAM PC-830 Chain One Color, 8 Speed
Replacement option
27.2mm diameter

Race Face Ride XC Seatpost Black, 27.2x375mm
Replacement option
More parts (3)Fewer parts
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 essentialsQuick reference before buying parts
Archived specifications for reference. Check the fitted parts before ordering.
- Front tire
- 24" Kenda KineticCheck: Verify the fitted tire’s size marking and rim type.
- Drivetrain
- 8-speedCheck: Match the installed drivetrain family, not just its speed count.
- Seatpost diameter
- 27.2 mmCheck: Read the post’s diameter marking; seat-clamp size differs.
- Bottom bracket / shell
- Truvativ Howitzer XRCheck: Verify shell type and width, crank interface, and spindle length or spacers.
Not confirmed in this record: Rear tire. Check the fitted parts for these details.
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: 2011 Rocky Mountain Reaper 24 · Juvenile mountain bike, suspension · Published sizes: 12.5"
Frame and fork
Inspect the frame and fork →Archived: Frame: Aluminum · Fork: Suntour XCR
Suspension
Evaluate the suspension →Archived: Fork: Suntour XCR
Drivetrain
Check drivetrain wear →Archived: Group: Mountain Mix · Shifters: Shimano ST-EF51 · Front derailleur: Shimano TX50 · Rear derailleur: Shimano Altus · Crankset: Truvativ Ruktion, 32/22t teeth · Bottom bracket: Truvativ Howitzer XR · Cassette: Shimano HG-30 · Rear cogs: 8-speed, 11 - 32 teeth · Chain: Shimano HG40
Brakes
Inspect the brakes →Archived: Brakes: Promax DSK7-20 Mechanical Disc 160mm Rotor brakes, Shimano EF51 levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 24" wheels · Rims: Alex DM-18 · Hubs: RMB XC Disc · Front tire: 24" Kenda Kinetic
Controls and contact points
Archived: Headset: FSA ZST-10 · Handlebar: RMB AM · Stem: RMB FR 10-degree 40mm · Seatpost: RMB XC, 27.2mm diameter · Saddle: RMB FR Jr. · Pedals: RMB Jr Flat
Before and during the test ride
Follow the full used-bike inspection order →Have you owned this model?Help document firsthand fit, ride and maintenance details that may no longer be available.
This archive record has limited published detail. Share what would help another rider understand how this model fit, rode and held up over time. Velopedia reviews every contribution before publication.
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.




