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2021 GT

Speed Series Pro

A 20″ aluminum frame bmx bike with promax hydraulic disc brakes.
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Manufacturer Price

$900
FrameAluminum
SuspensionRigid
ForkSteel
Wheels20″ Aluminum
DrivetrainSingle-speed
BrakesPromax Hydraulic Disc
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Insights
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

26 km/h

Speed Series Pro

Highest gear

(descending)

Geometry
Specs
Build
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

BB StandardBB86/BB92, Press Fit

Fork

GT BMX Pro Race, 100% Cr-Mo 1 1/8" Steerer, Tapered Legs, 3/8" Dropouts

Bottom Bracket

Sealed BB86

Headset

1-1/8"-1.5" Taper Integrated Design, 45X45 Degree Sealed Bearings

Stem

Promax Impact Top Load, 53mm

Handlebar

GT Speed Cr-Mo 8.375"H x 29"W, 8° Sweep, 4° Up, Taper Cross Bar

Saddle

BOX Echelon

Seatpost

Integrated

TypeRigid

Pedals

GT Low Profile FS Platform Design

Grips

GT Statement Double Lock-on Grips

Groupset
Crank

GT Forged Alloy 2pc. 175mm Arms, 24mm Hollow/ Cr-Mo Spindle, 44T AL CNC Chain Ring, Alloy Chain Ring Bolts

Cassette

16T Cog

Chain

KMC Z1 Narrow, 3/32"

Brakes

Promax Hydro Disc Rear, 140mm Rotor (Rear Only), Front: Promax Hydro Disc Rear, 140mm Rotor (Rear Only), Rear: Promax Hydro Disc Rear, 140mm Rotor (Rear Only)

TypePromax Hydraulic Disc

Brake Levers

Alloy, 2 Finger

Wheels
Rims

Alloy Double Wall, 36h

Spokes

Stainless Steel, 14g

Front Hub

GT Speed Series, Alloy CNC Body, Sealed Bearings, 28h, 3/8" Female Allen Bolts

Rear Hub

GT Speed Series Disc Cassette, Alloy CNC body, 4 Sealed Bearings, 6 Pawl 72point Alloy Shimano Cassette, 36h, 3/8" Female Allen Bolts w/ Alloy Washers

Tires

Kenda Kompact Pro Race 20 x 1.75"

Rider Notes
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First added 24 March

Last updated 16 September

Not listed for 986 days