VelopediaBicycle Archive · Specification report

1998 Mongoose NX 8.1

Velopedia Archive ID 75477

Overview

Model year1998
BrandMongoose
ModelNX 8.1
Bicycle typeMountain bike, front & rear suspension
Archive ID75477
Original MSRP$1,050.00
ColorsBlue, green, polished
SizesLarge, medium, small

Frameset

Frame constructionTIG-welded
Frame materialAluminum, double-butted
ForkRock Shox Indy C
Fork materialAluminum/magnesium, triple-clamp crown
Rear shockRock Shox Deluxe, 3.5" travel

Drivetrain

Component groupMountain Mix
ShiftersShimano STX-RC RapidFire SL
Front derailleurShimano STX top-swing, top-pull
Rear derailleurShimano STX-RC
CranksetShimano Alivio, 22/32/42 teeth
Rear cogs8-speed, 11 - 30 teeth
ChainShimano CN-IG31, 1/2 x 3/32"
PedalsAluminum cage w/clips & straps

Brakes

BrakesTektro linear-pull brakes, Tektro levers

Cockpit & contact points

Headset1 1/8" threadless Tioga
HandlebarMongoose Comp
Handlebar extensionsNot included
StemMongoose
SaddleMongoose
SeatpostMongoose micro-adjust, 31.4mm diameter

Wheels & tires

HubsFront: Mongoose OS, Rear: Shimano STX-RC
RimsWeinmann Zac 19
SpokesStainless steel, 1.8mm straight gauge
Front tireFront: 26 x 2.10" Tioga Edge, Rear: 26 x 2.10" Tioga Psycho TT
Wheel size26" wheels

Geometry · Legacy reference

Top tube560 mm
Chainstay / rear center425 mm
Fork offset / rake40.6 mm

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