Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Aluminum -
Wheels 20" -
Suspension Rigid -
Brakes Coaster
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
Specialized A1 Premium Aluminum, 20"" frame w/ low standover TT design, integrated kickstand, horizontal dropouts
Suspension Fork
1-1/8"" threadless Hi-Ten steerer w/ 1-1/8"" blades
Drivetrain
Crank
Heat-treated Hi-Ten, 1pc.
Bottom Bracket
Heat treated Hi-Ten cups, loose ball for 1pc.
Chain
KMC Z-410, 1/2"" x 1/8""
Pedals
Composite platform w/ reflectors, loose ball, 9/16""
Wheels
Front Hub
Steel, nutted axle, 36h
Rear Hub
Steel, coaster brake, nutted axle, 36h
Rims
Alloy pinned, 36h
Spokes
UCP 14g, w/ brass nipple
Tires
Specialized Rhythm Lite Sport, 30 TPI, wire bead, 20x2.0""
Brakes
Brakes
Coaster w/ linear pull
Cockpit
Stem
Alloy Ahead
Handlebar
Steel 2pc.
Grips
Specialized Kraton
Headset
1-1/8"" threadless, loose ball
Seat
Saddle
Specialized Kids, 7mm rail w/ clamp
Seatpost
Steel, 25.4mm
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | 12" | 16" | 20" |
|---|---|---|---|
| Bottom Bracket Height | 165 mm | 198 mm | 227 mm |
| Rake | 24 mm | 24 mm | 23.5 mm |
| Top Tube Length | 305 mm | 385 mm | 439 mm |
| Seat Tube Angle | 76 ° | 74 ° | 76 ° |
| Seat Tube Length | 179 mm | 210 mm | 241 mm |
| Head Tube Angle | 70 ° | 70 ° | 70 ° |
| Head Tube Length | 70 mm | 80 mm | 80 mm |
| Chainstay Length | 271 mm | 310 mm | 389 mm |
| Standover Height | 338 mm | 412 mm | 482 mm |
| Wheels | 20" | 20" | 20" |
About this model
Hotrock 20 Coaster Boys completes the Specialized Hotrock model. Specialized launched 35 bikes of this model so far. You can get a glimpse at all models from 2012, by clicking on 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.
Average price for Youth bikes
If you want an acceptable Youth bike you should know that the average price is 278$. However, you could also get a good Youth bike even if you pay a lower amount than the average price. 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 20 Coaster Boys components
Fork material
When it comes to the fork, this bike has a steel one, which tends to be more flexible than carbon forks in general. However, a carbon fork is considerably lighter.
Wheels
As for the wheels, Specialized Hotrock 20 Coaster Boys 2012, has a 20″ aluminum model. The 20″ 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
When you want to stop the bike in time, the brakes are vital. The Hotrock 20 Coaster Boys has Coaster brakes. These brakes are pretty efficient, and they’re not so pricey. However, if your chain falls off or snaps, your coaster brakes won’t function anymore.