Bicycle Archive · Specification report

1999 Mongoose SX 4.3 (02)

Velopedia Archive ID 80121

Overview

Model year	1999
Brand	Mongoose
Model	SX 4.3 (02)
Bicycle type	Mountain bike, non-suspension
Archive ID	80121
Original MSRP	$359.99
Colors	Wired Blue
Sizes	Large, medium, small, womens 17"

Frameset

Frame construction	TIG-welded
Frame material	Aluminum
Fork	Mongoose
Fork material	Chromoly, oversize, unicrown crown
Rear shock	N/A

Drivetrain

Component group	Mountain Mix
Shifters	Shimano AceraX EZ Fire Plus
Front derailleur	Shimano Altus top-swing, top-pull
Rear derailleur	Shimano AceraX
Crankset	SR XR17, 24/34/42 teeth
Rear cogs	7-speed, 11 - 28 teeth
Chain	Shimano CN-UG50, 1/2 x 3/32"
Pedals	Resin

Brakes

Brakes	Aluminum linear-pull brakes, Shimano Altus levers

Cockpit & contact points

Headset	Mongoose sealed
Handlebar	Mongoose
Handlebar extensions	Not included
Stem	Mongoose
Saddle	Mongoose Dual Density
Seatpost	Mongoose micro-adjust

Wheels & tires

Hubs	Front: aluminum, Q/R, Rear: aluminum, QR
Rims	Weinmann 519, 36-hole
Spokes	Stainless steel, 2.0mm straight gauge
Front tire	26 x 1.95" Mongoose Hanz
Wheel size	26" wheels

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 28, 2026.