GT Speed Series Pro

Name: GT Speed Series Pro
Brand: GT

2021 BMX Manufacturer page

Last known price: $900

Prices shown first for United States
Suspension: Rigid
Wheels: 20″
Drivetrain: 1 × 1 44t / 16t
Gear range: 100%
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

11 of 20 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

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 Not identified

Suspension

1 part

Fork
- GT

Drivetrain

4 parts

Bottom bracket

Sealed BB86 Not identified
Cassette

16T Cog Not identified
Chain
- KMC Z1 Narrow 1 speed
Crankset
- GT 44t

Brakes

2 parts

Brake levers

Alloy, 2 Finger Not identified
Brakes
- ProMax

Wheels and tires

5 parts

Front hub
- GT
Rear hub
- GT
Rims

Alloy Double Wall, 36h Not identified
Spokes

Stainless Steel, 14g Not identified
Tires
- Kenda

Cockpit and contact points

7 parts

Grips
- GT
Handlebar
- GT
Headset

1-1/8"-1.5" Taper Integrated Design, 45X45 Degree Sealed Bearings Not identified
Pedals
- GT
Saddle

BOX Echelon Not identified
Seatpost

Integrated Not identified
Stem
- ProMax

Sizes and geometry

3 sizes

Rider-height ranges are not published for these sizes.

Size

Geometry not published

The manufacturer lists these sizes without frame measurements, so there is no drawing or geometry table.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Steel

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 44
Largest chainring: 44
Rear sprockets: 1
Smallest sprocket: 16
Largest sprocket: 16
Lowest gear: 55.0 in
Highest gear: 55.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: No shifting

Additional specifications

Bottom bracket standard: BB86/BB92
Tire width: 1.75″
Wheel material: Aluminum
Wheel size: 20″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 21.1 km/h
Highest gear: 21.1 km/h

Total gear range 100%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 55.0–55.0 gear inches

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2021 builds
Specification	This bicycle GT Speed Series Pro	GT Speed Series Expert	GT Speed Series Expert XL	GT Speed Series Junior	GT Speed Series Micro	GT Speed Series Mini
Frame
Fork material	Steel	Steel	Steel	Aluminum	Aluminum	Aluminum
Drivetrain
Smallest chainring	44	42	42	40	38	38
Largest chainring	44	42	42	40	38	38
Lowest gear	55.0 in	52.5 in	52.5 in	50.0 in	47.5 in	47.5 in
Highest gear	55.0 in	52.5 in	52.5 in	50.0 in	47.5 in	47.5 in
Brakes
Brake type	Hydraulic disc	Rim brake	Rim brake	Rim brake	Rim brake	Rim brake
Other specifications
Bottom bracket standard	BB86/BB92	Not informed	Not informed	Not informed	Not informed	Not informed
Tire width	1.75″	Not informed	Not informed	Not informed	Not informed	Not informed