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2021 GT

Speed Series Expert XL

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

$690
FrameAluminum
SuspensionRigid
ForkSteel
Wheels20″ Aluminum
DrivetrainSingle-speed
BrakesPromax Rim
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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)

16 mph

Speed Series Expert XL

Highest gear

(descending)

Sizing
XL

3'11" +

🐐 Estimated

Rider Fit Notes

None yet.

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Geometry
Specs
Build
Frame

GT Speed Series MK7 Junior Race Design, 6061-T6 AL, Alloy Formed and Butted Speed Metal Tubes, Reverse Dropouts, Euro BB, 1-1/8" Integrated H/T

Fork

GT BMX Pro Race, 100% Cr-Mo 1 1/8" Steerer, Tapered Legs, 305mm A/C, 3/8" Dropouts

Bottom Bracket

Euro Sealed Bearing

Headset

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

Stem

GT Top Load, 1", 40mm

Handlebar

GT Speed Cr-Mo 6.5"H x 26"W, 8° Sweep, 4° Up, Taper Cross Bar

Saddle

BOX Echelon

Seatpost

Integrated

TypeRigid

Pedals

GT Low Profile FS Platform Design

Grips

GT Statement

Groupset
Crank

GT Forged Alloy 2pc. 170mm Arms, 24mm Hollow/ Cr-Mo Spindle, 42T AL CNC Chain Ring, Alloy Chain Ring Bolts

Cassette

16T Cog

Chain

KMC Z1 Narrow, 3/32"

Brakes

Promax MV-87, 85mm Cold Forged AL Arms, Mini V-Type, Front: Promax MV-87, 85mm Cold Forged AL Arms, Mini V-Type, Rear: Promax MV-87, 85mm Cold Forged AL Arms, Mini V-Type

TypePromax Rim

Brake Levers

Alloy V-type

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 Cassette, Alloy CNC body, 5 Sealed Bearings, 3 Pawl Cassette, 36h, 3/8" Allen Bolts

Tires

Kenda Kompact Pro Race, 20 x 1-1/8"

Rider Notes
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First added March 24

Last updated September 16

Not listed for 986 days