Bicycle Archive · Specification report

2003 Specialized Hotrock Coaster 20" Girls

Velopedia Archive ID 30231

Overview

Model year	2003
Brand	Specialized
Model	Hotrock Coaster 20" Girls
Bicycle type	Juvenile mountain bike, non-suspension
Archive ID	30231
Original MSRP	$140.00
Sizes	Girls 9"

Frameset

Frame construction	TIG-welded
Frame material	Chromoly
Fork	Specialized
Fork material	Hi-tensile steel, unicrown crown
Rear shock	N/A

Drivetrain

Component group	Mountain Mix
Shifters	N/A
Front derailleur	N/A
Rear derailleur	N/A
Crankset	Steel one-piece
Bottom bracket	Sealed
Rear cogs	1-speed
Chain	1/2 x 3/32"
Pedals	Resin

Brakes

Brakes	Coaster/aluminum linear-pull rear brakes, linear-pull rear levers

Cockpit & contact points

Headset	1 1/8" threadless sealed mechanism
Handlebar	Steel
Handlebar extensions	Not included
Stem	Specialized steel
Saddle	Specialized Expert
Seatpost	Aluminum, 27.2mm diameter

Wheels & tires

Hubs	Aluminum, nutted
Rims	Specialized aluminum, 36-hole
Spokes	Stainless steel, 14ga. (2.0mm) straight gauge
Spoke nipples	Brass nipples
Front tire	20 x 2.125" Specialized Spanky
Wheel size	20" wheels

Geometry · Legacy reference

Head-tube angle	71°
Seat-tube angle	74°
Chainstay / rear center	380 mm
Wheelbase	860 mm

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