Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
GT
2018 GT Grade Alloy Expert
Value Guide market data · 2018 GT Grade Alloy Expert
12-month trend
8%
Direction and magnitude, not judgment
vs. category average
13%
Drops faster than category avg
Price over time - 2018 GT Grade Alloy Expert
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Grade model years
2018 Grade Alloy Expert lineup
Overview
About this bike
2018 GT Grade Alloy Expert value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Frame:
- Grade alloy frame with smooth welds, hydroformed (TT,DT), Tapered 1 1/8" to 1 1/4" headtube, standard BB
- Fork:
- Grade Carbon 1 1/8 to 1 1/4" threadless alum steerer, disc specific
- Fork
- Grade Carbon 1 1/8 to 1 1/4" threadless aluminum steerer, disc specific
- Frame
- Grade alloy frame with smooth welds, hydroformed
Drivetrain
- Groupset
- Shimano 105
- Chain:
- KMC X11-1
- Crank:
- FSA Vero Compact 50alloy/34alloy
- Bottom Bracket:
- Sealed Cartridge
- Front Derailleur:
- Shimano 105
- Rear Derailleur:
- Shimano 105 11spd
- Shifters:
- Shimao 105 STI 11spd
- Bottom Bracket
- Sealed Cartridge
- Cassette
- Shimano 105 11spd 11-32
- Chain
- KMC X11-1
- Chainrings
- 50/34
- Crankset
- FSA Vero Compact
- Front Derailleur
- Shimano 105
- Rear Derailleur
- Shimano 105 11spd
- Shifters
- Shimao 105 STI 11spd
Brakes
- Brake:
- (F) TRP Hyrd Hydraulic disc road brake, 160mm rotor, (R) TRP Hyrd Hydraulic disc road brake, 160mm rotor
- Brake Levers:
- Shimano 105 STI 11spd
- Brake Levers
- Shimano 105
- Brakes
- TRP HY-RD Hydraulic disc road brake, 160mm rotors
Cockpit
- Handlebar:
- New GT DropTune Super Light double butted 6061 alloy bar with 16degree flair
- Stem:
- GT Design 3D forged 6061, 4 bolt face plate 7? Rise, 31.8mm Clamp
- Grips:
- Velo Cork
- Headset:
- Integrated TH sealed bearing
- Saddle:
- GT Grade saddle
- Seat Post:
- one bolt aluminum
- Seat Clamp:
- New Alloy blk ano
- Grips
- Velo Cork
- Handlebar
- New GT DropTune Super Light double butted 6061 alloy bar with 16 degree flair
- Headset
- Integrated TH sealed bearing
- Saddle
- GT Grade saddle
- Seatpost
- One bolt aluminum
- Stem
- GT Design 3D forged 6061, 4 bolt face plate 7° Rise, 31.8mm Clamp
Wheels & Tires
- Rims:
- GT ATD470 disc specific road 22mm tall profile
- Tires:
- WTB Exposure Wire Bead, 700X32c (F/R)
- Hubs:
- (F) Formula Ultralight 6 bolt disc sealed 28h, (R) Formula Ultra light 6 bolt disc sealed casette 28h
- Spokes:
- 15g stainless steel
- Front Tire
- WTB Exposure Wire Bead, 700X32c
- Hubs
- Formula Ultralight 6 bolt disc sealed
- Spokes
- 15g stainless steel
Pedals
- Pedals:
- Low Profile Nylon w/ Toe Clips
- Pedals
- Low Profile Nylon w/ Toe Clips
Accessories
- Cog Set:
- Shimano 105 11spd 11-32
- Wheels/Rims
- GT ATD470 disc specific road 22mm tall profile, 28h
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
Carbon inspection
Tap test the frame, fork, seatpost, and bars for cracks; verify no impact damage near dropouts.
Inspection
Brake hoses & cables
Check hydraulic line bleed, cable housing wear, and confirm rotors are within spec.