Specialized Hotrock 24 XC Disc

Name: Specialized Hotrock 24 XC Disc
Brand: Specialized

2017 YouthGeneral youth Manufacturer page

Fork travel: 63 mm
Wheels: 24″
Drivetrain: 3 × 8 22–42t / 11–34t
Gear range: 590%
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

14 of 21 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, double-butted, formed down tube/top tube, externally relieved head tube, forged dropouts w/replaceable hanger, disc mount Not identified

Suspension

1 part

Fork
- SR Suntour

Drivetrain

7 parts

Bottom bracket

Square taper, cartridge bearings, 68mm Not identified
Cassette
- SunRace 11–34t
Chain
- KMC X8 8 speeds
Crankset
- SR Suntour 42/32/22t
Front derailleur
- SR Suntour
Rear derailleur
- Shimano Acera
Shifters
- Shimano

Brakes

1 part

Brakes
- Tektro Auriga

Wheels and tires

5 parts

Front hub
- Specialized
Rear hub
- Specialized
Rims

24"", aluminum double-wall, 32h Not identified
Spokes

Stainless, 14g Not identified
Tires
- Specialized

Cockpit and contact points

6 parts

Grips
- Specialized
Handlebar
- Specialized
Pedals

Platform Not identified
Saddle
- Specialized
Seatpost

Alloy, single bolt, 27.2mm Not identified
Stem

Forged alloy, 20 degree rise, 4 bolt, 25.4mm clamp diameter 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"

Table

Reach 335mm

Stack 504mm

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.

Size Reach Stack

Complete manufacturer geometry table 2 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	335	372
Stackmm	504	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
Front centermm	544	587
Bottom bracket dropmm	45	37
Bottom bracket heightmm	263.5	271
Standover heightmm	610	643
Fork rakemm	37	37
Trailmm	73	73
Stack/reach ratio	1.50	1.39
Suspension and parts
Crank lengthmm	152	160
Handlebar widthmm	620	620
Stem lengthmm	70	80
Seatpost lengthmm	300	350

Not published by the manufacturer: Front travel, Rear travel, Stem angle and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Steel

Suspension

Suspension configuration: Hardtail
Front travel: 63 mm

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 22
Largest chainring: 42
Rear sprockets: 8
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 15.5 in
Highest gear: 91.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

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

Technical analysis

2 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

15.5 gear inches

This value is below the central range for this class.

Cohort: Youth / General youth Model year: 2017
Sample: 120 bicycles with this information
Coverage: 77.4% of the class

Highest gear

91.6 gear inches

This value is above the central range for this class.

Cohort: Youth / General youth Model year: 2017
Sample: 120 bicycles with this information
Coverage: 77.4% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 5.9 km/h
Highest gear: 35.1 km/h

Total gear range 590%

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: 15.5–91.6 gear inches
Class reference (p10–p90): 17.9–91.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Youth / General youth Model year: 2017
Lowest gear: 120 bicycles with this information, 77.4% of the class
Highest gear: 120 bicycles with this information, 77.4% of the class

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 2017 builds
Specification	This bicycle Specialized Hotrock 24 XC Disc	Specialized Hotrock 24 XC Pro
Drivetrain
Front chainrings	3	2
Largest chainring	42	36
Rear sprockets	8	10
Largest sprocket	34	36
Lowest gear	15.5 in	14.7 in
Highest gear	91.6 in	78.6 in
Other specifications
Fork spring	Coil	Air

Changes since 2016
Specification	2016 Specialized Hotrock 24 XC Disc	This bicycle Specialized Hotrock 24 XC Disc
Frame
Intended fit	boys	Unisex
Other specifications
Travel	Configuration: HardtailFront: Travel: 63 mm	Configuration: HardtailFront: Travel: 63 mmRear: Additional specification: Not available: Yes
Fork spring	Not informed	Coil