Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
GT
1998 GT Aggressor
Value Guide market data · 1998 GT Aggressor
12-month trend
— %
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 1998 GT Aggressor
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Aggressor model years
2021$716 - $832▲ 96% vs. 1998
2020$581 - $675▲ 59% vs. 1998
2019$539 - $626▲ 48% vs. 1998
2018$512 - $594▲ 40% vs. 1998
2017$512 - $594▲ 40% vs. 1998
2016$465 - $540▲ 28% vs. 1998
2015$512 - $594▲ 40% vs. 1998
2014$512 - $594▲ 40% vs. 1998
2013$437 - $508▲ 20% vs. 1998
2012$409 - $475▲ 12% vs. 1998
2010$326 - $378▼ 11% vs. 1998
2008$260 - $302▼ 29% vs. 1998
2007$260 - $302▼ 29% vs. 1998
2006$279 - $324▼ 23% vs. 1998
2002$539 - $626▲ 48% vs. 1998
2001$539 - $626▲ 48% vs. 19981998$365 - $423Currently viewing1998 Aggressor lineup
Overview
About this bike
1998 GT Aggressor value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Frame Construction
- TIG-welded
- Frame Tubing Material
- Chromoly
- Fork Brand & Model
- RST 261
- Fork Material
- Chromoly, triple-clamp crown
- Rear Shock
- Not applicable
Drivetrain
- Groupset
- 1998 GT Aggressor
- Component Group
- Mountain Mix
- Shift Levers
- Shimano Alivio RapidFire Plus
- Crankset
- SR/Suntour XR25, 24/34/46 teeth
- Bottom Bracket
- Shimano BB-LP27
- Rear Cogs
- 7-speed, 11 - 28 teeth
- Chain
- Shimano CN-UG50, 1/2 x 3/32inch
Brakes
- Brakeset
- Dia-Compe VC-757 brakes, Dia-Compe DP-7 levers
Cockpit
- Seatpost
- Aluminum micro-adjust, 26.8mm diameter
- Saddle
- GT
- Handlebar
- Flat
- Handlebar Stem
- GT Hi-Rise
- Headset
- 1 1/8inch sealed
Wheels & Tires
- Hubs
- Aluminum, Q/R
- Rims
- Weinmann 519, 36-hole
- Tires
- 26 x 2.10inch knobby
- Spoke Brand
- Stainless steel, 2.0mm straight gauge
- Spoke Nipples
- Brass nipples
Pedals
- Pedals
- Resin
Accessories
- Colors
- Black, Orange
- BB Shell Width
- 68mm English
- Extensions
- Not included
Weight & Sizing
- Sizes
- 12.5inch, 14.5inch, 16inch, 18inch, 19inch, 20inch
Frame sizing
XS4'10"-5'2"
S5'2"-5'6"
M5'6"-5'10"
L5'10"-6'2"
XL6'2"-6'6"
M highlighted as most common resale size. Sourced from catalog metadata.
Geometry
- Stack
- Varies by size
- Reach
- Varies by size
- Wheelbase
- Varies by size
Industry standard. Sourced from catalog metadata.
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Wheel condition
Inspect rims, hubs, spokes, and bearing play; ask about the tire age and any prior wheel rebuilds.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Suspension service
Confirm fork lowers and rear shock service intervals; ask for the most recent service receipts.
Inspection
Frame pivots & bearings
Cycle the suspension off the bike to feel for play, grit, or noise in pivot bearings.