Velopedia Bicycle Archive
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Compare published geometry, gearing and specifications for up to three bicycles.
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1 of 2 bicycles
At a glance
Key differences
Supported differences are shown below. Data limitations are labeled separately.
- Data limitation
No geometry is recorded for 2011 GT Slammer and 2008 GT Slammer.
- Data limitation
Only 2011 GT Slammer has enough published drivetrain data for gearing calculations.
Gearing comparison
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
RPM = pedal turns per minute.
Ratio2.54:1
Estimated speed at 90 RPMGear
Uses front tire 20×2.1; rear size isn’t listed.
Gearing unavailable for this size.
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.
Complete specification tableShows different published values and gaps where a bicycle lacks data. Different wording reflects source language, not necessarily different components. Swipe for more columns.
Specification
2011 GT Slammer
2008 GT Slammer
Overview
Model Year
2011
2008
Brand
GT
GT
Model
Slammer
Slammer
Bicycle Type
BMX
BMX
Original MSRP
Not documented
$199.99
Colors
White, Yellow
Silver/Red
Sizes
—
One size fits all
Weight
—
—
Frameset
Frame Construction
Steel
TIG-welded
Frame Material
Steel
GT BMX FS design
Fork
GT Freestyle
GT BMX design
Fork Material
—
Unicrown
Drivetrain
Component Group
BMX Mix
BMX
Crankset
Forged steel, 33T teeth
GT Forged steel 1pc.
Bottom Bracket
Loose ball
Steel, ball type
Cassette
Dnp
Dnp
Rear Cogs
13 teeth
1-speed, 14 teeth
Chain
KMC Z510
KMC Z410
Pedals
GT Jump design
GT Jump design, resin
Brakes
Brakes
Rush 900D front/Rush 933D rear brakes, Tektro 289A levers
Tektro 907A U-brake brakes, Tektro 319AC levers
Cockpit & Contact Points
Headset
1 1/8" Threadless
1 1/8" TH
Handlebar
GT dirt/street steel
GT BMX dirt/street
Handlebar Extensions
Not included
Not included
Stem
GT freestyle drop
GT FS design
Saddle
GT Slim Mini Street
GT freestyle
Seatpost
Steel, 25.4mm diameter
Steel
Wheels & Tires
Hubs
Steel
Steel shell w/ 14mm Axle
Rims
Alex G303, 32-hole/36-hole
Alex G303, 48-hole
Spokes
14ga. (2.0mm)
14ga. (2.0mm)
Spoke Nipples
Brass
Brass nipples
Front Tire
20 x 2.1" GT Air Bags
20" GT Air Bags
Wheel Size
20" wheels
20" wheels
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.