Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
GT
2018 GT BK Team Signature
Value Guide market data · 2018 GT BK Team Signature
12-month trend
8%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 2018 GT BK Team Signature
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All BK model years
2018 BK Team Signature lineup
Overview
About this bike
2018 GT BK Team Signature value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork:
- Revamped, 100% Cr-Mo, 1pc Threaded Steerer, Tapered Legs, 3/8" Axle x 31mm Offset
- Fork
- Revamped, 100% Cr-Mo 1pc. threaded steerer, tapered legs, 31mm offset
- Frame
- GT FS design, Cr-Mo front triangle, downtube gusset, mid BB, removable rotor tabs, Odyssey Springfield brake-compatible
Drivetrain
- Groupset
- 2018 GT BK Team Signature
- Chain:
- KMC HL710 Half Link
- Crank:
- GT Power Series Cr-Mo 170mm 2pc, 19mm x 48T Cr-Mo Spindle, GT 5mm 25T AL Chainwheel
- Bottom Bracket:
- MID Sealed Bearing
- Bottom Bracket
- MID sealed bearing
- Chain
- KMC HL710 Half Link
- Chainrings
- 25T GT 5mm aluminum
- Crankset
- GT Power Series tubular Cr-Mo 2pc, 170mm arms, Cr-Mo 19mm x 48-spline
- Freewheel
- 9T driver
Brakes
- Brake:
- Aluminum U-Brake
- Brake Levers:
- Hinged Alloy
- Brake Levers
- Hinged Alloy
- Brakes
- Aluminum U-brake
Cockpit
- Handlebar:
- GT Freestyle 4pc. 100% Cr-Mo, 9"H x 29"W, 5?Up, 9? Back
- Stem:
- GT BK Elevated 100% CNC Top Load 1-1/8", 34mm Rise, 48mm Length
- Grips:
- GT Super Soft 155mm, w/ GT plug
- Headset:
- 1 1/8" Integrated Design, 45X45 Degree Sealed Bearings
- Saddle:
- GT BK Signature Pivotal
- Seat Post:
- Alloy Pivotal 25.4 x 200mm
- Seat Clamp:
- Built-in clamp
- Grips
- GT Super Soft 155mm single compound w/o flange w/ GT removable plug
- Handlebar
- GT Freestyle 4pc. 100% Cr-Mo, 9"H x 29"W, 5°Up, 9° Back
- Headset
- 1-1/8" Integrated design, 45x45 degree sealed bearings
- Saddle
- GT BK Signature Pivotal
- Seatpost
- Alloy Pivotal 25.4 x 200mm
- Stem
- GT BK Elevated 100% CNC topload 1-1/8" steerer clamp, 34mm rise, 48mm length
Wheels & Tires
- Rims:
- Alloy Double Wall, 20" 36 Hole (F/R)
- Tires:
- GT Pool 20x2.3" (F/R)
- Hubs:
- GT, Alloy, 36H (F) Female 3/8" Sealed, (R) 9T Sealed 14mm Free Coaster
- Axles
- Front: 17mm female w/ 3/8" bolts, Rear: Cr-Mo 14mm x 180mm axle, 17mm nut
- Front Tire
- GT Pool 20 x 2.30
- Hubs
- Front: Alloy body, sealed bearings, Rear: Sealed bearing freecoaster
- Rims
- Alloy Double wall, 36h
Pedals
- Pedals:
- GT Low Profile Platform, Cr-Mo Axle
- Pedals
- GT Low Profile platform, Cr-Mo axle
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.