Bicycle Archive · Specification report

1998 Mongoose Expert

Velopedia Archive ID 76598

Overview

Model year	1998
Brand	Mongoose
Model	Expert
Bicycle type	BMX
Archive ID	76598
Original MSRP	$230.00
Colors	Pencil grey, team
Sizes	Expert

Frameset

Frame construction	TIG-welded
Frame material	Chromoly main triangle/hi-tensile steel rear stays
Fork	Mongoose
Fork material	Chromoly, unicrown crown
Rear shock	N/A

Drivetrain

Component group	N/A
Shifters	N/A
Front derailleur	N/A
Rear derailleur	N/A
Crankset	Mongoose 1-piece, 43 teeth
Bottom bracket	One piece
BB shell width	American
Rear cogs	1-speed, 16 teeth
Chain	KMC, 1/2 x 3/32"
Pedals	Mongoose resin

Brakes

Brakes	Tektro linear-pull rear brakes, Mongoose aluminum levers

Cockpit & contact points

Headset	1 1/8" threadless steel
Handlebar	Mongoose
Handlebar extensions	N/A
Stem	Mongoose
Saddle	Mongoose
Seatpost	Mongoose micro-adjust, 26.0mm diameter

Wheels & tires

Hubs	Mongoose OS
Rims	Mongoose aluminum, 36-hole
Spokes	Steel, 2.0mm straight gauge
Spoke nipples	Brass nipples
Front tire	20 x 1.95" Mongoose Blur
Wheel size	20" wheels

Geometry · Legacy reference

Top tube	538.5 mm
Head-tube angle	73°
Seat-tube angle	71°
Chainstay / rear center	383.5 mm
Wheelbase	965.2 mm
Fork offset / rake	25.4 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 26, 2026.