Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
GT
2021 GT Speed Series Pro
Value Guide market data · 2021 GT Speed Series Pro
12-month trend
11%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 2021 GT Speed Series Pro
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Speed Series model years
2021 Speed Series Pro lineup
Overview
About this bike
2021 GT Speed Series Pro value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- GT BMX Pro Race, 100% Cr-Mo 1 1/8" Steerer, Tapered Legs, 3/8" Dropouts
- Frame
- GT Speed Series MK7 Elite Race Design, 6061-T6 AL, Alloy Formed and Butted Speed Metal Tubes, AL CNC/Forged Quick Change Disc Dropout SyStem, BB86, Taper 1-1/8" to 1-1/2" Integrated H/T
Drivetrain
- Groupset
- 2021 GT Speed Series Pro
- Bottom Bracket
- Sealed BB86
- Chain
- KMC Z1 Narrow, 3/32"
- Chainrings
- 44T
- Crankset
- GT Forged Alloy 2pc., 175mm Arms, 24mm Hollow/ Cr-Mo Spindle, 44T AL CNC Chain Ring, Alloy Chain Ring Bolts
- Freewheel
- 16T Cog
Brakes
- Brakes
- Promax Hydro Disc Rear, 140mm Rotor (Rear Only)
Cockpit
- Handlebars
- GT Speed Cr-Mo 8.375"H x 29"W, 8° Sweep, 4° Up, Taper Cross Bar
- Headset
- 1-1/8"-1.5" Taper Integrated Design, 45X45 Degree Sealed Bearings
- Saddle
- BOX Echelon
- Seatpost
- Integrated
- Stem
- Promax Impact Top Load, 53mm
- Grips
- GT Statement Double Lock-on Grips
Wheels & Tires
- Rims
- Alloy Double Wall, 36h
- Spokes
- Stainless Steel, 14g
- Tires
- Kenda Kompact Pro Race 20 x 1.75"
Pedals
- Pedals
- GT Low Profile FS Platform Design
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.