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.

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Original build6061 aluminum · Mountain Mix · 24" wheels

Historical catalog variants

Archived sizes and colors

1 item record

Item-level catalog entries recovered from Velopedia’s original bicycle archive. They document how this model was listed historically; they do not identify the frame size associated with legacy reference geometry or indicate current availability.

Published sizes

12.5"

Published colors

Black
View 1 archived size/color combination
SizeColor
12.5"Black

Historical catalog evidence. Exact specifications and naming may vary by market, production run or manufacturer revision.

Frameset

Frame ConstructionAluminum
Frame Material6061 aluminum
ForkSuntour XCR

Drivetrain

Component GroupMountain Mix
ShiftersShimano ST-EF51
Front DerailleurShimano TX50
Rear DerailleurShimano Altus
CranksetTruvativ Ruktion, 32/22t teeth
Bottom BracketTruvativ Howitzer XR
CassetteShimano HG-30
Rear Cogs8-speed, 11 - 32 teeth
ChainShimano HG40
PedalsRMB Jr Flat

Brakes

BrakesPromax DSK7-20 Mechanical Disc 160mm Rotor brakes, Shimano EF51 levers

Cockpit & Contact Points

HeadsetFSA ZST-10
HandlebarRMB AM
Handlebar ExtensionsNot included
StemRMB FR 10-degree 40mm
SaddleRMB FR JR.
SeatpostRMB XC, 27.2mm diameter

Wheels & Tires

HubsRMB XC Disc
RimsAlex DM-18
SpokesStainless stainless
Front Tire24" Kenda Kinetic
Wheel Size24" wheels

Gearing

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

All published sizes32/22T · 11–32T · 8-speed
Lowest0.69:1 Highest2.91:1 Total range423%

Speed unavailable: wheel or tire size is missing or unclear.

Add your rear tire size to calculate speed
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
Gears

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

Rear tire

Apply the marking on your rear tire or edit its dimensions below. Older or fractional inch sizes need the ISO marking (e.g. 37-590).

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

Gear, dimension and cadence changes update results automatically.

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

Parts & serviceability

Find replacement parts

Original specifications
Chain · Original
Shimano HG40
Retailer offers
Seatpost · Original
RMB XC

27.2mm diameter

Retailer offers
Rear derailleur · Original
Shimano Altus
More parts (3)Fewer parts
Shifters · Original
Shimano ST-EF51
Headset · Original
FSA ZST-10
Rims · Original
Alex DM-18

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
0 of 20 checked Progress stays in this browser for this record.

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: 2011 Rocky Mountain Reaper 24 · Juvenile mountain bike, suspension · Published sizes: 12.5"

Archived: Frame: Aluminum · Fork: Suntour XCR

Archived: Fork: Suntour XCR

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

Archived: Brakes: Promax DSK7-20 Mechanical Disc 160mm Rotor brakes, Shimano EF51 levers

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

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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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