GT Speed Series Pro XL 24

Name: GT Speed Series Pro XL 24
Brand: GT

2025 BMX Manufacturer page

Last known price: $900

Prices shown first for United States
Suspension: Rigid
Wheels: 20″
Drivetrain: 1 × 1 41t / 18t
Gear range: 100%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XL 167.6–195.6

Components

10 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, 6061-T6 AL, Alloy Formed and Butted Speed Metal Tubes, AL CNC/Forged Quick Change Disc Dropout SyStem, BB86, Taper 1-1/8-1.5" Integrated H/T Not identified

Suspension

1 part

Fork
- GT

Drivetrain

4 parts

Bottom bracket

BB86 Sealed Bearings Not identified
Cassette

18T Cog Not identified
Chain
- KMC Z1 Narrow 1 speed
Crankset
- GT 41t

Brakes

2 parts

Brake levers

Alloy, 2 Finger Not identified
Brakes

Hydro Disc Rear, 140mm Rotor (Rear Only) Not identified

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 Sealed Integrated, (45) Not identified
Pedals
- GT
Saddle

BOX Echelon Not identified
Seatpost

Integrated Not identified
Stem
- ProMax

Sizes and geometry

1 size Open in the geometry plotter

Enter your height to highlight matching ranges.

Size XL

Table

Geometry diagram unavailable

The drawing needs wheelbase, reach, stack, head tube length, seat tube length and chainstay length, which the manufacturer did not publish. Available facts remain in the table.

Size Reported by the manufacturer

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Head tube angle	73°
Seat tube angle	70°
Bottom bracket dropmm	12
Fork rakemm	1.3

Not published by the manufacturer: Reach, Stack, Top tube length, Seat tube length, Head tube length, Chainstay length, Wheelbase, Front center, Bottom bracket height, Standover height, Trail, Stack/reach ratio, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

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: 41
Largest chainring: 41
Rear sprockets: 1
Smallest sprocket: 18
Largest sprocket: 18
Lowest gear: 45.6 in
Highest gear: 45.6 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: 17.5 km/h
Highest gear: 17.5 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: 45.6–45.6 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 2025 builds
Specification	This bicycle GT Speed Series Pro XL 24	GT Speed Series Expert	GT Speed Series Expert XL	GT Speed Series Junior	GT Speed Series Mini	GT Speed Series Pro
Frame
Fork material	Steel	Steel	Steel	Aluminum	Aluminum	Steel
Drivetrain
Smallest chainring	41	42	42	40	38	44
Largest chainring	41	42	42	40	38	44
Smallest sprocket	18	16	16	16	16	16
Largest sprocket	18	16	16	16	16	16
Lowest gear	45.6 in	52.5 in	52.5 in	50.0 in	47.5 in	55.0 in
Highest gear	45.6 in	52.5 in	52.5 in	50.0 in	47.5 in	55.0 in
Brakes
Brake type	Hydraulic disc	Rim brake	Rim brake	Rim brake	Rim brake	Hydraulic disc
Other specifications
Bottom bracket standard	BB86/BB92	Not informed	Not informed	Not informed	Not informed	BB86/BB92
Tire width	1.75″	Not informed	1.5″	Not informed	Not informed	1.75″