Bicycle Archive · Specification report

1998 Gary Fisher Mt. Jam

Velopedia Archive ID 76824

Overview

Model year	1998
Brand	Gary Fisher
Model	Mt. Jam
Bicycle type	Juvenile mountain bike, suspension
Archive ID	76824
Original MSRP	$329.99
Colors	Chrome-plated
Sizes	11.5"

Frameset

Frame construction	Welded
Frame material	Chromoly seat tube/hi-tensile steel
Fork	RST 261
Fork material	Aluminum, triple-clamp crown
Rear shock	N/A

Drivetrain

Component group	Mountain Mix
Shifters	Grip Shift MRX-170
Front derailleur	Shimano AceraX top-swing, top-pull
Rear derailleur	Shimano Tourney TY-22
Crankset	SR XR17, 24/34/42 teeth
Bottom bracket	YST BB 613
BB shell width	68mm English
Rear cogs	6-speed, 14 - 28 teeth
Chain	Shimano CN-UG50, 1/2 x 3/32"
Pedals	Wellgo LU-945

Brakes

Brakes	Linear-pull brakes, aluminum levers

Cockpit & contact points

Headset	1" HP01H
Handlebar	Steel
Handlebar extensions	Chromoly
Stem	Steel
Saddle	Fisher SuperSoft
Seatpost	Steel, 26.6mm diameter

Wheels & tires

Hubs	Steel, nutted
Rims	Weinmann 519, 32-hole
Spokes	Steel, 1.8mm straight gauge
Spoke nipples	Brass nipples
Front tire	24 x 1.95" knobby
Wheel size	24" wheels

Geometry · Legacy reference

Top tube	525 mm
Head-tube angle	70.5°
Seat-tube angle	74.3°
Chainstay / rear center	394 mm
Wheelbase	981 mm
Fork offset / rake	40.6 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 30, 2026.