Velopedia Bicycle Archive

2011 GT Slammer

Original specifications: BMX Mix drivetrain · 20" wheels.

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At a glance

Archive #25115

Model year: 2011
Category: BMX
Colors: White, Yellow
In this record: 23 specifications · 2 archived images

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Identification clues

2011 archived details

Published colors: White, Yellow
Frame: Steel
Original equipment: BMX Mix

Clues, not proof of model year. Colors vary and components may have been replaced.

Original buildSteel · BMX Mix · 20" wheels

Historical catalog variants

Archived sizes and colors

2 item records

Item-level catalog entries recovered from Velopedia’s original bicycle archive. They document how this model was listed historically; they do not identify the frame size associated with legacy reference geometry or indicate current availability.

Published colors

WhiteYellow

View 2 archived size/color combinations

Size	Color
—	White
—	Yellow

Historical catalog evidence. Exact specifications and naming may vary by market, production run or manufacturer revision.

Frameset

Frame Construction	Steel
Frame Material	Steel
Fork	GT Freestyle

Drivetrain

Component Group	BMX Mix
Crankset	Forged steel, 33T teeth
Bottom Bracket	Loose ball
Cassette	Dnp
Rear Cogs	13 teeth
Chain	KMC Z510
Pedals	GT Jump design

Brakes

Brakes	Rush 900D front/Rush 933D rear brakes, Tektro 289A levers

Cockpit & Contact Points

Headset	1 1/8" Threadless
Handlebar	GT dirt/street steel
Handlebar Extensions	Not included
Stem	GT freestyle drop
Saddle	GT Slim Mini Street
Seatpost	Steel, 25.4mm diameter

Wheels & Tires

Hubs	Steel
Rims	Alex G303, 32-hole/36-hole
Spokes	14ga. (2.0mm)
Spoke Nipples	Brass
Front Tire	20 x 2.1" GT Air Bags
Wheel Size	20" wheels

Gearing

Lower gears help on climbs. Higher gears suit higher speeds.

Pedal cadence

RPM

Speed units

RPM = pedal turns per minute.

Published build33T · 13T

Ratio2.54:1

Estimated speed At 90 RPM Gear13.7 mph

Uses front tire 20×2.1; rear size isn’t listed.

How it works

Ratio = front teeth ÷ rear teeth. Hub gears also include the hub’s internal ratio. A 400% range means the highest ratio is four times the lowest.

Speeds are estimates from tire size and pedal cadence. Actual speeds vary.

Try other gearing

Try your current gearingChanged tires or gears? Calculate your setup.

Your changes apply to this calculation. The archived build stays unchanged.

Gears Drivetrain

Front teeth Smallest rear teeth Largest rear teeth

Use up to three front tooth counts, separated by /. For one rear sprocket, enter the same count twice.

Rear tire

Rear tire marking

Apply the marking on your rear tire or edit its dimensions below. Older or fractional inch sizes need the ISO marking (e.g. 37-590).

Rim diameter (BSD, mm) Tire width (mm)

For 32-622, width is 32 mm and rim diameter is 622 mm. Use the rear tire on mixed-wheel bikes. Leave both fields empty to compare ratios only.

Cadence (RPM) Speed units

Gear, dimension and cadence changes update results automatically.

Gearing comparison
Measure	Original	Your setup
Lowest ratio	—	—
Highest ratio	—	—
Total range	—	—
Lowest-gear speed	—	—
Highest-gear speed	—	—

Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.

Parts & serviceability

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Original specifications

Front tire · Original

20 x 2.1" GT Air Bags Replacement search: 20x2.1 bicycle tire Before ordering: Check rim type and tire clearance.

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Seatpost · Original

Steel

25.4mm diameter

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Parts and service referenceQuick reference before buying parts

Archived specifications for reference. Check the fitted parts before ordering.

Front tire: 20 x 2.1" GT Air Bags
Drivetrain: BMX Mix
Seatpost diameter: 25.4 mm
Bottom bracket / shell: Loose ball

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Gallery2 images

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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.

2011 GT Slammer