Specialized Hotrock 24 St. Girls

2010 YouthGeneral youth Manufacturer page

Suspension: Rigid
Wheels: 24″
Drivetrain: 3 × 7 24–42t / 14–28t
Gear range: 350%
Frame: Aluminum
Brakes: Rim brake

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

9 of 23 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Specialized A1 Premium Aluminum, 24"" frame, rigid fork geo w/ low standover TT, formed DT, forged dropouts w/ replaceable hanger Not identified

Suspension

1 part

Fork

Swagged alloy straight blade, 1 1/8"" steerer w/ canti mounts Not identified

Drivetrain

7 parts

Bottom bracket
- VP
Cassette
- Shimano MF-TZ21 14–28t
MF-TZ21
Chain
- KMC Z7 7 speeds
Crankset

Forged alloy arms, triple chainring with guard, 152mm Not identified
Front derailleur
- Shimano
FD-CO50
Rear derailleur
- Shimano RD-TX31
RD-TX31TX-31
Shifters
- Shimano
RS-31

Brakes

2 parts

Brake levers

Junior reduced reach ""V"", alloy, linear pull compatible Not identified
Brakes

Front: Alloy linear pull, Rear: Alloy linear pull Not identified

Wheels and tires

5 parts

Front hub

Forged alloy, 32h with 3/8"" axle, nutted Not identified
Rear hub

Forged alloy freewheel type, 32h with 3/8"" axle, nutted Not identified
Rims
- Alex Rims
C-1000
Spokes

2mm 14g stainless Not identified
Tires
- Specialized

Cockpit and contact points

7 parts

Grips

Kraton, Revo type Not identified
Handlebar

Hi-Ten, 600mm wide, 40mm rise, 10 degree back sweep, 6 degree up sweep Not identified
Headset

1-1/8"" threadless Not identified
Pedals

Composite platform, 9/16"" Not identified
Saddle
- Specialized
Seatpost

Alloy, 27.2mm, microadjust Not identified
Stem

Alloy A-Head, melt forged, 60mm, 15 degree rise Not identified

Sizes and geometry

1 size Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size 24"

Table

Geometry diagram unavailable

The drawing needs reach and stack, which the manufacturer did not publish. Available facts remain in the table.

Size

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Top tube lengthmm	505
Seat tube lengthmm	312
Head tube lengthmm	120
Head tube angle	69°
Seat tube angle	73°
Chainstay lengthmm	420
Wheelbasemm	992
Front centermm	576
Bottom bracket heightmm	247
Standover heightmm	560
Fork rakemm	45

Not published by the manufacturer: Reach, Stack, Bottom bracket drop, Trail, Stack/reach ratio, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: girls
Frame material: Aluminum
Fork material: Aluminum

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 24
Largest chainring: 42
Rear sprockets: 7
Smallest sprocket: 14
Largest sprocket: 28
Lowest gear: 20.6 in
Highest gear: 72.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 1.5″
Travel: Front: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 24″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.9 km/h
Highest gear: 27.6 km/h

Total gear range 350%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.