Velopedia Bicycle Archive
2015 Specialized Hotrock 24 XC Boys
Original specifications: Youth mix drivetrain · 24 wheels.
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At a glance
- Model year
- 2015
- Category
- Mountain
- Original MSRP
- $470.00
- Sizes
- 11.5, 13.5"
- Colors
- Black/Red/White
- In this record
- 24 specifications · archived image · original MSRP
- Archive ID
- 1166497
Model history 2 other years
Frameset
| Frame Construction | Specialized A1 Premium Aluminum, double-butted, formed downtube/toptube, externally relieved headtube, forged dropouts w/ replaceable hanger, disc mount |
|---|---|
| Frame Material | Aluminum |
| Fork | SR Suntour XCT-JR-24-SHLO, 1pc. alloy lower, coil/MCU spring, Hi-Ten 25.4mm stanchions, 1-1/8" steerer, direct press type dust seal, preload adjust, MCD, V-brake mount, 50mm travel |
| Fork Material | Suspension |
Drivetrain
| Component Group | Youth mix |
|---|---|
| Shifters | SRAM 3.0 Comp, Grip Shift, 7-speed |
| Front Derailleur | SR Suntour, 3-speed, high mount |
| Rear Derailleur | SRAM X3, 7-speed, medium cage |
| Crankset | SR Suntour XCT-JR, replaceable outer ring, 42/32/22, w/ chainguard |
| Bottom Bracket | Square taper, cartridge bearings, 68mm |
| Rear Cogs | Shimano MegaRange, 7-speed, 14-34 |
| Chain | KMC Z51, 8-speed |
| Pedals | Nylon, loose ball bearings, 9/16", w/ reflectors |
Brakes
| Brakes | V-brake, die cast alloy, linear pull, 60mm 1 pc. pads |
|---|
Cockpit & Contact Points
| Headset | 1-1/8" threadless |
|---|---|
| Handlebar | Specialized Kids, flat bar, alloy, 8-degree upsweep, 4-degree backsweep, 25mm rise, 25.4mm |
| Stem | Ahead, forged alloy, 4-bolt, 20-degree rise |
| Saddle | Specialized youth, steel rails |
| Seatpost | Alloy, single bolt, 27.2mm |
Wheels & Tires
| Hubs | Forged alloy, double-sealed, ground race, QR, 32h, Forged alloy, freewheel type, double-sealed, ground race, QR, 32h |
|---|---|
| Rims | Alex, 24", alloy double-wall, pin joint, 32h |
| Spokes | Stainless, 14g, w/ brass nipple |
| Front Tire | Specialized Fast Trak Sport, 60TPI, wire bead, 24x1.8" |
| Wheel Size | 24 |
Published drivetrain ratios
Gearing
Lower ratios provide more mechanical advantage for climbing. Higher ratios turn the rear wheel farther with each crank revolution.
The bar uses the same mechanical-ratio calculation as Compare. Wheel-dependent speed appears only when the record includes an exact ISO/ETRTO rear tire size; no tire size is assumed.
Parts & serviceability
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More qualified parts (4)
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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: 2015 Specialized Hotrock 24 XC Boys · Mountain Hardtail · Published sizes: 11.5, 13.5"
Frame and fork
Inspect the frame and fork →Archived: Frame: Specialized A1 Premium Aluminum, double-butted, formed downtube/toptube, externally relieved headtube, forged dropouts w/ replaceable hanger, disc mount · Fork: SR Suntour XCT-JR-24-SHLO, 1pc. alloy lower, coil/MCU spring, Hi-Ten 25.4mm stanchions, 1-1/8" steerer, direct press type dust seal, preload adjust, MCD, V-brake mount, 50mm travel · Suspension
Suspension
Evaluate the suspension →Archived: Fork: SR Suntour XCT-JR-24-SHLO, 1pc. alloy lower, coil/MCU spring, Hi-Ten 25.4mm stanchions, 1-1/8" steerer, direct press type dust seal, preload adjust, MCD, V-brake mount, 50mm travel
Drivetrain
Check drivetrain wear →Archived: Group: Youth mix · Shifters: SRAM 3.0 Comp, Grip Shift, 7-speed · Front derailleur: SR Suntour, 3-speed, high mount · Rear derailleur: SRAM X3, 7-speed, medium cage · Crankset: SR Suntour XCT-JR, replaceable outer ring, 42/32/22, w/ chainguard · Bottom bracket: Square taper, cartridge bearings, 68mm · Rear cogs: Shimano MegaRange, 7-speed, 14-34 · Chain: KMC Z51, 8-speed
Brakes
Inspect the brakes →Archived: Brakes: V-brake, die cast alloy, linear pull, 60mm 1 pc. pads
Wheels and tires
Check wheels and tires →Archived: Wheel size: 24 · Rims: Alex, 24", alloy double-wall, pin joint, 32h · Hubs: Forged alloy, double-sealed, ground race, QR, 32h, Forged alloy, freewheel type, double-sealed, ground race, QR, 32h · Front tire: Specialized Fast Trak Sport, 60TPI, wire bead, 24x1.8"
Controls and contact points
Archived: Headset: 1-1/8" threadless · Handlebar: Specialized Kids, flat bar, alloy, 8-degree upsweep, 4-degree backsweep, 25mm rise, 25.4mm · Stem: Ahead, forged alloy, 4-bolt, 20-degree rise · Seatpost: Alloy, single bolt, 27.2mm · Saddle: Specialized youth, steel rails · Pedals: Nylon, loose ball bearings, 9/16", w/ reflectors
Before and during the test ride
Follow the full used-bike inspection order →Have you owned this bike?Help document firsthand fit, ride and maintenance details that may no longer be available.
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Current market
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.



