Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
GT
2020 GT Grunge 20
Value Guide market data · 2020 GT Grunge 20
12-month trend
4%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
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
2020 Grunge 20 lineup
Overview
About this bike
2020 GT Grunge 20 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- GT Hi-Ten Steel, 1" Threaded Steerer
- Frame
- 20" GT LegitFit Design, Alloy
Drivetrain
- Groupset
- 2020 GT Grunge 20
- Crankset
- Forged One-Piece Type, 127mm, 32T
- Bottom Bracket
- Steel, Ball type
- Chain
- KMC S1, 1/2x1/8"
- Cassette/Rear Cogs
- 16T Coaster
Brakes
- Brakes
- Coaster rear
Cockpit
- Saddle
- GT 1-piece
- Headset
- Steel, 1"
- Stem
- 2-Bolt alloy top, steel quill
- Handlebars
- Steel Riser bar, 176mm rise, 580mm width
- Seat Post
- Alloy
- Tape/Grips
- 120mm closed end
Wheels & Tires
- Hubs
- Front: Steel, Nutted axle
- Tires
- GT 20 x 1.95"
- Spokes
- Stainless Steel, 14g
Pedals
- Pedals
- Jr. BMX design, resin
Accessories
- Rims/Wheels
- Alloy, 28h
- Color
- Black / Green
Weight & Sizing
- Size
- 20-inch
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.