Bicycle Archive · Specification report

2009 Specialized Hotrock 20 Boys

Velopedia Archive ID 15750

Overview

Model year	2009
Brand	Specialized
Model	Hotrock 20 Boys
Bicycle type	Juvenile mountain bike, suspension
Archive ID	15750
Original MSRP	$320.00
Colors	Gloss Black/Yellow, Gloss Silver/Red, Gloss White/Black, Gloss Black Green

Frameset

Frame construction	TIG-welded
Frame material	Specialized A1 Premium Aluminum
Fork	RST Capa C20, 50mm travel
Fork material	Steel/aluminum, single crown
Rear shock	N/A

Drivetrain

Component group	Mountain Mix
Shifters	Twist-shift
Crankset	Sugino w/chainguide, 36 teeth
Bottom bracket	VP, 128mm spindle
BB shell width	68mm
Rear cogs	6-speed
Chain	KMC Z50, 1/2 x 3/32"
Pedals	Composite

Brakes

Brakes	Alloy Linear Pull

Cockpit & contact points

Headset	1 1/8" Threadless
Handlebar	Hi-Ten riser
Handlebar extensions	Not included
Stem	Alloy
Saddle	Specialized
Seatpost	Alloy Micro Adjust, 27.2mm diameter

Wheels & tires

Hubs	Front: Alloy nutted, Rear: Forged alloy
Rims	Alex C-1000, 32-hole
Spokes	UCP, 14ga. (2.0mm)
Front tire	20 x 2.125" Specialized Roller
Wheel size	20" wheels

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on October 4, 2026.