VelopediaBicycle Archive · Specification report

2004 Specialized Hotrock 20 Freewheel Boys

Velopedia Archive ID 92411

Overview

Model year2004
BrandSpecialized
ModelHotrock 20 Freewheel Boys
Bicycle typeJuvenile mountain bike, non-suspension
Archive ID92411
ColorsSilver, Yellow/Black
SizesBoys 9.5"

Frameset

Frame constructionTIG-welded
Frame materialChromoly
ForkSpecialized
Fork materialHi-tensile steel, unicrown crown
Rear shockN/A

Drivetrain

Component groupMountain Mix
ShiftersN/A
Front derailleurN/A
Rear derailleurN/A
CranksetSteel one-piece
Bottom bracketSealed
Rear cogs1-speed
Chain1/2 x 3/32"
PedalsResin

Brakes

BrakesCoaster/aluminum linear-pull rear brakes, linear-pull rear levers

Cockpit & contact points

Headset1 1/8" threadless sealed mechanism
HandlebarSteel
Handlebar extensionsNot included
StemSpecialized steel
SaddleSpecialized Expert
SeatpostAluminum, 27.2mm diameter

Wheels & tires

HubsAluminum, nutted
RimsSpecialized aluminum, 36-hole
SpokesStainless steel, 14ga. (2.0mm) straight gauge
Spoke nipplesBrass nipples
Front tire20 x 2.125" Specialized Roller
Wheel size20" wheels

Geometry · Legacy reference

Top tube435 mm
Head-tube angle71°
Seat-tube angle74°
Chainstay / rear center380 mm
Wheelbase860 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on October 3, 2026.