Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
GT
2018 GT Mach One Expert
Previous used estimate
$109 - $113
Actual value depends on condition, size, and local demand.
Value Guide market data · 2018 GT Mach One Expert
12-month projected trend
1%
Direction and magnitude, not judgment
vs. category average
2%
Holds value better than category avg
Price over time - 2018 GT Mach One Expert
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Mach One model years
2021$174 - $179▲ 59% vs. 2018
2020$138 - $142▲ 26% vs. 2018
2019$124 - $128▲ 14% vs. 20182018$109 - $113Currently viewing2017$109 - $1120% vs. 2018
2016$102 - $105▼ 7% vs. 2018
2015$99 - $102▼ 9% vs. 2018
2012$71 - $73▼ 35% vs. 2018
2011$71 - $73▼ 35% vs. 2018
2006$63 - $65▼ 42% vs. 2018
2005$63 - $65▼ 42% vs. 2018Compare Mach One Expert models
1 modelsChoose a different build or frame style to see its value.
Overview
About this bike
GT helped define BMX from the beginning, so you know their Mach One Expert is the perfect tool for racing. The rugged aluminum frame is light and tough, and the fork is ready to rail berms and clean doubles. This sweet rig also features a powerful linear-pull brake, quick-rolling 20-inch wheels and dirt-ready Kenda Race tires.
Specifications
- Subtype
- BMX
- Category
- BMX
- Component Fork
- GT Mach One Race, Steel, 1 1/8" Steerer, Oval Legs, 3/8" Dropouts
- Component Hubs
- Front: Steel Body, 28HRear: Freewheel, 28H
- Component Size
- 19.25-inch
- Component Stem
- GT Top Load 1-1/8" Aluminum, 50mm Length
- Product Family
- Mach One
- Component Axles
- Front: 3/8" AxleRear: 3/8" Axle
- Component Chain
- KMC Z410
- Component Color
- Black
- Component Frame
- GT Mach One Race, 6061 AL, Euro BB, Reverse Dropouts, 1-1/8" Integrated H/T
- Component Brakes
- Alloy V-type
- Component Pedals
- GT Mini Platform
- Component Saddle
- GT Uni Mini Kevlar padded
- Component Crankset
- Alloy Forged 3-Piece, Square Taper, 140mm, Alloy Forged 3-Piece, Square Taper, 140mm
- Component Handlebar
- GT Race, Steel, 6.5"H x 26"W, 8-degree Back, 4-degree Up
- Component Seat Post
- AL integrated w/ Saddle, 25.4 x 150mm
- Component Chainrings
- 36T Steel Chain Ring
- Component Front Tire
- Kenda Race 20" x 1-3/8"
- Component Tape Grips
- GT Statement
- Component Brake Levers
- Alloy V-type
- Component Bottom Bracket
- Euro Sealed
- Hubs
- Front: Steel Body, 28HRear: Freewheel, 28H
- Crankset
- Alloy Forged 3-Piece, Square Taper, 140mm, Alloy Forged 3-Piece, Square Taper, 140mm
- Pedals
- GT Mini Platform
- Bottom Bracket
- Euro Sealed
- Chain
- KMC Z410
- Saddle
- GT Uni Mini Kevlar padded
- Handlebar
- GT Race, Steel, 6.5"H x 26"W, 8-degree Back, 4-degree Up
- Stem
- GT Top Load 1-1/8" Aluminum, 50mm Length
- Axles
- Front: 3/8" AxleRear: 3/8" Axle
- Brake Levers
- Alloy V-type
- Brakes
- Alloy V-type
- Chainrings
- 36T Steel Chain Ring
- Fork
- GT Mach One Race, Steel, 1 1/8" Steerer, Oval Legs, 3/8" Dropouts
- Frame
- GT Mach One Race, 6061 AL, Euro BB, Reverse Dropouts, 1-1/8" Integrated H/T
- Seat Post
- AL integrated w/ Saddle, 25.4 x 150mm
- Tape/Grips
- GT Statement
- Color
- Black
- Size
- 19.25-inch
- Front Tire
- Kenda Race 20" x 1-3/8"
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.