Specialized Hotrock A1 FS 24 Boys

2012 YouthGeneral youth Manufacturer page

Fork travel: 50 mm
Wheels: 24″
Drivetrain: 3 × 7 22–42t / 14–34t
Gear range: 464%
Frame: Aluminum
Brakes: Rim brake

Sizes

Size guide

11.5"
13.5"

The manufacturer did not publish rider heights for these sizes.

Components

11 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 frame, double-butted and formed DT/TT, externally relieved HT and forged dropouts w/ replaceable hanger and disc mount Not identified

Suspension

1 part

Fork
- SR Suntour
JR-24

Drivetrain

7 parts

Bottom bracket

Square taper, cartridge bearing, double crank stop Not identified
Cassette
- Shimano 14–34t
Chain
- KMC
Crankset
- SR Suntour
Front derailleur
- SR Suntour
Rear derailleur
- SRAM X3 7 speeds
Shifters
- SRAM

Brakes

2 parts

Brake levers
- Tektro Junior
Brakes

Front: Die cast, alloy ""V"" brake, 1pc. pad, Rear: Die cast, alloy ""V"" brake, 1pc. pad Not identified

Wheels and tires

5 parts

Front hub

Forged alloy, double-sealed, ground race, QR, 32h Not identified
Rear hub

Forged alloy, freewheel type, double-sealed, ground race, QR, 32h Not identified
Rims
- Alex Rims
Spokes

Stainless, 1.8mm (15g) Not identified
Tires
- Specialized

Cockpit and contact points

7 parts

Grips
- Specialized
Handlebar

Kid's Riser Bar, alloy, 600mm wide, 30mm rise, 25.4mm Not identified
Headset

1-1/8"" threadless, loose ball Not identified
Pedals

Resin body w/ reflectors, loose ball, 9/16"" Not identified
Saddle

Body Geometry Kid's Rival, 7mm rail, front and rear bumpers Not identified
Seatpost

Alloy, 27.2mm, micro adjust Not identified
Stem

Alloy Ahead, 4 bolt, 20º rise, 25.4mm clamp Not identified

Sizes and geometry

2 sizes Open in the geometry plotter

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

Size 11.5"

Table

Reach 335mm

Stack 505mm

Wheelbase 960mm

Head angle 70.0°

Seat angle 73.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 24″ wheel; exact published values are in the table below. Bottom bracket drop is derived from the published bottom bracket height.

Size Reach Stack

Complete manufacturer geometry table 2 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	335	372
Stackmm	505	516
Top tube lengthmm	490	530
Seat tube lengthmm	305	342
Head tube lengthmm	90	110
Head tube angle	70°	70°
Seat tube angle	73°	73°
Chainstay lengthmm	420	420
Wheelbasemm	960	1005
Bottom bracket heightmm	264	271
Standover heightmm	608	648
Stack/reach ratio	1.51	1.39

Not published by the manufacturer: Front center, Bottom bracket drop, Fork rake, Trail, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: boys
Frame material: Aluminum
Fork material: Aluminum

Suspension

Suspension configuration: Hardtail
Front travel: 50 mm

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 22
Largest chainring: 42
Rear sprockets: 7
Smallest sprocket: 14
Largest sprocket: 34
Lowest gear: 15.5 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

Fork spring: Coil
Tire width: 1.8″
Wheel material: Aluminum
Wheel size: 24″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 5.9 km/h
Highest gear: 27.6 km/h

Total gear range 464%

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.

This bicycle: 15.5–72.0 gear inches

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2012 builds

Differences across 2012 builds
Specification	This bicycle Specialized Hotrock A1 FS 24 Boys	Specialized Hotrock 12 Coaster Boys	Specialized Hotrock 12 Coaster Girls	Specialized Hotrock 16 Coaster Boys	Specialized Hotrock 16 Coaster Girls	Specialized Hotrock 20 Boys 6-speed
Frame
Intended fit	boys	boys	girls	boys	girls	boys
Suspension
Suspension configuration	Hardtail	Rigid	Rigid	Rigid	Rigid	Hardtail
Front travel	50 mm	Not informed	Not informed	Not informed	Not informed	40 mm
Drivetrain
Front chainrings	3	1	1	1	1	1
Smallest chainring	22	28	28	28	28	36
Largest chainring	42	28	28	28	28	36
Rear sprockets	7	Not informed	Not informed	Not informed	Not informed	6
Smallest sprocket	14	Not informed	Not informed	Not informed	Not informed	14
Largest sprocket	34	Not informed	Not informed	Not informed	Not informed	28
Lowest gear	15.5 in	Not informed	Not informed	Not informed	Not informed	25.7 in
Highest gear	72.0 in	Not informed	Not informed	Not informed	Not informed	51.4 in
Brakes
Brake type	Rim brake	Coaster brake	Coaster brake	Coaster brake	Coaster brake	Rim brake
Other specifications
Fork spring	Coil	Not informed	Not informed	Not informed	Not informed	Coil
Suspension	Hardtail	Rigid	Rigid	Rigid	Rigid	Hardtail
Tire width	1.8″	2″	2″	2″	2″	2.125″
Wheel size	24″	12″	12″	16″	16″	20″