Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Aluminum -
Wheels 24" -
Travel Front 50mm -
Fork SunTour XCT
-
Groupset Tourney, Shimano -
Suspension Hardtail -
Drivetrain 3 × 7 -
Brakes Rim
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
Specialized A1 Premium Aluminum, 24"" frame, suspension fork geo w/ low standover TT, formed DT/TT, forged dropouts w/ replaceable hanger
Suspension Fork
SR Suntour SF11-XCT-JR-24, 1pc. alloy lower, 25.4mm Hi-Ten stanchions, 1-1/8"" Hi-Ten steerer, coil/mcu w/ preload adj. 50mm travel
Drivetrain
Rear Derailleur
Shimano TX-31, 7-speed, direct mount
Front Derailleur
Shimano FD-CO50, 3-speed
Shift Levers
Shimano RS-31, 6-speed, Revo Twist
Cassette
Shimano 7-speed, 14-28t
Crank
Forged alloy arms, triple chainring with chainguard
Bottom Bracket
Water sealed, loose ball, 68mm x 128mm
Chain
KMC Z7, reusable Missing Link
Pedals
Composite platform w/ reflectors, loose ball, 9/16""
Wheels
Front Hub
Forged alloy, loose ball, nutted axle, 32h
Rear Hub
Forged alloy, freewheel type, 32h, nutted axle
Rims
Alex C-1000, alloy single-wall, 32h
Spokes
Stainless, 2.0mm (14g)
Tires
Specialized Roller Sport, 30 TPI, wire bead, 24x2.125""
Brakes
Brakes
Die cast, alloy ""V"" brake, 1pc. pad
Brake Levers
Tektro junior reduced-reach ""V"", alloy, linear pull compatible
Cockpit
Stem
Alloy Ahead, 4 bolt, 20º rise, 25.4mm clamp
Handlebar
Hi-Ten riserbar, 40mm rise, 10º backsweep, 6º upsweep, 25.4mm
Grips
Specialized Revo type
Headset
1-1/8"" threadless, loose ball
Seat
Saddle
Specialized Kids Body Geometry, 1pc. 7mm rail w/ clamp
Seatpost
Alloy, 27.2mm, micro adjust
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | 7-SPD | 21" |
|---|---|---|
| Bottom Bracket Height | 262 mm | 262 mm |
| Front Center | 572 mm | 572 mm |
| Rake | 40 mm | 40 mm |
| Top Tube Length | 504 mm | 504 mm |
| Seat Tube Angle | 73 ° | 73 ° |
| Seat Tube Length | 312 mm | 312 mm |
| Head Tube Angle | 69 ° | 69 ° |
| Head Tube Length | 120 mm | 120 mm |
| Chainstay Length | 407 mm | 417 mm |
| Wheelbase | 975 mm | 989 mm |
| Standover Height | 583 mm | 583 mm |
| Wheels | 24" | 24" |
Model Overview
Hotrock 24 21-Speed Boys is part of the Specialized Hotrock model. There are 35 bikes that carry this model name. Check out the entire range from 2012 of this model, by clicking this link.
Safety
Make sure you wear a helmet on every ride, and that your bike performs well. In short, this means checking the tires, brakes, and chain to make sure everything is in good working order.
Youth bikes average price
If you want to purchase a solid Youth bike, it is important to know that the average cost is 278$. However, this doesn’t mean that if you spend less money on a Youth bike, you couldn’t get a decent one. As a general rule of thumb, you should always read reviews about the bike and its components before buying it to ensure you don’t pay too much.
Hotrock 24 21-Speed Boys components
Fork
This bike has the SunTour XCT fork installed. The fork’s travel is 50mm. Bike forks are great for shock absorption and provide you with a smooth ride. To sum it all, when buying a bike, ensure that you look for a fork capable of decent travel.
Fork material
Hotrock 24 21-Speed Boys has an aluminum fork, which doesn’t add too much extra weight to the bike. However, it is not so stiff as steel or carbon forks are.
Wheels size
As for the wheels, Specialized Hotrock 24 21-Speed Boys 2012, has a 24″ aluminum model. The 24″ wheels are a good fit for folding bikes, BMX, or children bikes. In conclusion, you can use them better on-road, and less on technical terrain.
Brakes
We ride faster and faster, so a good braking system is essential on a bike nowadays. The Hotrock 24 21-Speed Boys comes with Rim brakes. Rim brakes deliver an average performance overall. However, they are not nearly as effective as hydraulic brakes are.