Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
GT
2018 GT Speed Series Expert
Value Guide market data · 2018 GT Speed Series Expert
12-month trend
13%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 2018 GT Speed Series Expert
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Speed model years
2021$986 - $1,145▲ 14% vs. 2018
2020$814 - $945▼ 6% vs. 2018
2019$781 - $907▼ 10% vs. 20182018$865 - $1,004Currently viewing
2016$1,116 - $1,296▲ 29% vs. 2018
2015$1,414 - $1,642▲ 64% vs. 2018
2014$1,414 - $1,642▲ 64% vs. 2018
2013$1,135 - $1,318▲ 31% vs. 2018
2012$1,074 - $1,247▲ 24% vs. 20182000$747 - $867▼ 14% vs. 20181999$1,060 - $1,231▲ 23% vs. 2018.jpg)
1998$1,171 - $1,360▲ 35% vs. 2018
1997$1,228 - $1,426▲ 42% vs. 20181996$763 - $886▼ 12% vs. 20182018 Speed Series Expert lineup
Overview
About this bike
2018 GT Speed Series Expert value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork:
- BOX "XL" Pro Carbon 10mm Forks
- Fork
- BOX "XL" Pro Carbon 10mm fork
- Frame
- GT Speed Series MK7 Junior Race design, 6061-T6 aluminum, formed and butted tubes, reverse dropouts, Euro BB
Drivetrain
- Groupset
- 2018 GT Speed Series Expert
- Chain:
- KMC Z610
- Crank:
- GT Forged Alloy 2-Piece, 165mm Arms, 24mm Hollow Alloy Spindle, 39T AL CNC Chain Ring, AL Chain Ring Bolts
- Bottom Bracket:
- EB24 Sealed Bearings
- Bottom Bracket
- EB24 sealed bearings
- Chain
- KMC Z610
- Chainrings
- 39T CNC aluminum, AL chainring bolts
- Crankset
- GT Forged Alloy 2-Piece, 165mm Arms, 24mm hollow alloy spindle
Brakes
- Brake:
- Rear: Promax MV-87, 85mm Cold Forged AL Arms, Mini V-Type
- Brake Levers:
- Promax XL-91 V-Type AL 2 Finger Lever w/ Reach Adjust
- Brake Levers
- Promax BL-367
- Brakes
- Rear: Promax MV-87, 85mm cold forged AL arms, mini linear pull
Cockpit
- Handlebar:
- GT Speed Alloy 4"H x 24"W, 8? Back, 2? Up, Taper Cross Bar
- Stem:
- GT Top Load, Cold Forged 1", 40mm Length
- Grips:
- GT Statement
- Headset:
- 1-1/8" Integrated Design, 45X45 Degree Sealed Bearings
- Saddle:
- BOX Echelon
- Seat Post:
- AL integrated w/ Saddle, 22.2 x 135mm
- Seat Clamp:
- PROMAX, Aluminum, 25.4mm Single Bolt
- Grips
- GT Statement
- Handlebar
- GT Speed Alloy 4"H x 24"W, 8° back, 2° up, tapered cross bar
- Headset
- 1-1/8" Integrated design, 45x45 degree sealed bearings
- Saddle
- BOX Echelon
- Seatpost
- AL integrated w/ saddle, 22.2 x 135mm
- Stem
- GT Top Load, cold-forged 1", 40mm Length
Wheels & Tires
- Rims:
- Speed Series Aero Double Wall, 28 Hole (F/R)
- Tires:
- (F) Tioga Power Block 20x1-3/8" (R) 20x1-1/8"
- Spokes:
- 14G
- Axles
- Front: Female w/ 3/8" allen bolts w/ AL washers, Rear: Female w/ 3/8" allen bolts w/ AL washers
- Front Tire
- Tioga Power Block 20" x 1-1/8"
- Hubs
- Front: GT Mohawk, Alloy CNC body, sealed bearings, Rear: GT Mohawk, alloy CNC body, 4 Sealed Bearings, 4-pawl cassette
- Rims
- Speed Series aero double wall, 28h
- Spokes
- 14g
Pedals
- Pedals:
- GT Mini Size Platform, PP Material
- Pedals
- GT mini size platform, PP material
Accessories
- Extras:
- GT 6061 AL CNC Chain Tensioners
- Accessories & Extras
- GT 6061 AL CNC chain tensioners
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.