Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
GT
1999 GT Pro Series
Value Guide market data · 1999 GT Pro Series
12-month trend
— %
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 1999 GT Pro Series
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Pro model years
2021$823 - $956▲ 133% vs. 1999
2020$698 - $810▲ 98% vs. 1999
2019$637 - $740▲ 80% vs. 1999
2018$651 - $756▲ 84% vs. 1999
2017$521 - $605▲ 48% vs. 1999
2016$586 - $680▲ 66% vs. 1999
2015$605 - $702▲ 71% vs. 1999
2014$660 - $767▲ 87% vs. 1999
2013$674 - $783▲ 91% vs. 19992000$323 - $375▼ 9% vs. 19991999$353 - $410Currently viewing
1998$315 - $366▼ 11% vs. 19991996$651 - $756▲ 84% vs. 19991995$605 - $702▲ 71% vs. 19991999 Pro Series lineup
Overview
About this bike
1999 GT Pro Series value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Frame Construction
- Welded
- Frame Tubing Material
- Reynolds 631
- Fork Brand & Model
- GT
- Fork Material
- Chromoly, unicrown crown
- Rear Shock
- Not applicable
Drivetrain
- Groupset
- 1999 GT Pro Series
- Component Group
- Not applicable
- Shift Levers
- Not applicable
- Crankset
- GT 1-piece chromoly
- Bottom Bracket
- One piece
- Rear Cogs
- 1-speed, 16 teeth
- Chain
- 1/2 x 1/8inch
Brakes
- Brakeset
- Dia-Compe MX1, direct pull rear brakes, Dia-Compe MX-1 rear levers
Cockpit
- Seatpost
- Aluminum micro-adjust
- Saddle
- GT Drop Nose
- Handlebar
- GT
- Handlebar Stem
- GT Piston Invet
- Headset
- 1 1/8inch threadless Aheadset SX-1
Wheels & Tires
- Hubs
- GT Rhythm System sealed
- Rims
- GT Rhythm System aluminum
- Tires
- Front: 20 x 2.125inch GT AA Pro, Rear: 20 x 1.75inch GT AA Pro
- Spoke Brand
- Stainless steel, 2.0mm straight gauge
- Spoke Nipples
- Brass nipples
Pedals
- Pedals
- GT aluminum platform
Accessories
- Colors
- Midnight Blue, Silver Metallic
- Extensions
- Not applicable
Weight & Sizing
- Sizes
- Boys
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.