Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
GT
2020 GT Grunge 20
Previous used estimate
$114 - $117
Actual value depends on condition, size, and local demand.
Value Guide market data · 2020 GT Grunge 20
12-month projected trend
4%
Direction and magnitude, not judgment
vs. category average
1%
Drops faster than category avg
Price over time - 2020 GT Grunge 20
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Grunge model years
Compare Grunge 20 models
1 modelsChoose a different build or frame style to see its value.
Overview
About this bike
A bike designed to make your little one feel like a big kid. - 20" LegitFit alloy frame - Alloy rims - Rear coaster brake - F/R Fenders & chainguard
Specifications
- Subtype
- 20-inch
- Category
- Kids
- Component Fork
- GT Hi-Ten Steel, 1" Threaded Steerer
- Component Hubs
- Front: Steel, Nutted axle
- Component Size
- 20-inch
- Component Stem
- 2-Bolt alloy top, steel quill
- Product Family
- Grunge
- Component Chain
- KMC S1, 1/2x1/8"
- Component Color
- Black, Green
- Component Frame
- 20" GT LegitFit Design, Alloy
- Component Tires
- GT 20 x 1.95"
- Component Brakes
- Coaster rear
- Component Pedals
- Jr. BMX design, resin
- Component Saddle
- GT 1-piece
- Component Headset
- Steel, 1"
- Component Crankset
- Forged One-Piece Type, 127mm, 32T
- Component Seat Post
- Alloy
- Component Handlebars
- Steel Riser bar, 176mm rise, 580mm width
- Component Tape Grips
- 120mm closed end
- Component Bottom Bracket
- Steel, Ball type
- Component Cassette Rear Cogs
- 16T Coaster
- Hubs
- Front: Steel, Nutted axle
- Tires
- GT 20 x 1.95"
- Crankset
- Forged One-Piece Type, 127mm, 32T
- Pedals
- Jr. BMX design, resin
- Bottom Bracket
- Steel, Ball type
- Chain
- KMC S1, 1/2x1/8"
- Saddle
- GT 1-piece
- Headset
- Steel, 1"
- Stem
- 2-Bolt alloy top, steel quill
- Brakes
- Coaster rear
- Fork
- GT Hi-Ten Steel, 1" Threaded Steerer
- Frame
- 20" GT LegitFit Design, Alloy
- Handlebars
- Steel Riser bar, 176mm rise, 580mm width
- Seat Post
- Alloy
- Tape/Grips
- 120mm closed end
- Color
- Green
- Size
- 20-inch
- Cassette/Rear Cogs
- 16T Coaster
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.