- Frame
- High Tensile Steel
- Brakes
- Tektro 907 U-brake brakes, Tektro 289A levers
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At a glance
Key differences
Supported differences are shown below. Data limitations are labeled separately.
- Data limitation
No geometry is recorded for 2009 GT Slammer and 2008 GT Slammer.
- Data limitation
Only 2009 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.
Ratio2.57:1
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
2009 GT Slammer
2008 GT Slammer
Overview
Model Year
2009
2008
Brand
GT
GT
Model
Slammer
Slammer
Bicycle Type
BMX
BMX
Original MSRP
$259.99
$199.99
Colors
Brown/Yellow
Silver/Red
Sizes
19.5" TT
One size fits all
Weight
—
—
Frameset
Frame Construction
TIG-welded
TIG-welded
Frame Material
High Tensile Steel
GT BMX FS design
Fork
GT Freestyle
GT BMX design
Fork Material
High-tensile steel, unicrown crown
Unicrown
Drivetrain
Component Group
BMX
BMX
Crankset
Steel One Piece, 36 teeth
GT Forged steel 1pc.
Bottom Bracket
Steel
Steel, ball type
Cassette
Freewheel
Dnp
Rear Cogs
1-speed, 14 teeth
1-speed, 14 teeth
Chain
KMC Z510
KMC Z410
Pedals
GT Jump design, resin
GT Jump design, resin
Brakes
Brakes
Tektro 907 U-brake brakes, Tektro 289A levers
Tektro 907A U-brake brakes, Tektro 319AC levers
Cockpit & Contact Points
Headset
1 1/8" TH
1 1/8" TH
Handlebar
GT dirt/street Hi-Ten
GT BMX dirt/street
Handlebar Extensions
Not included
Not included
Stem
GT Freestyle aluminum
GT FS design
Saddle
GT freestyle
GT freestyle
Seatpost
Steel, 25.4mm diameter
Steel
Wheels & Tires
Hubs
Steel 14mm axle
Steel shell w/ 14mm Axle
Rims
Alex G303, 48-hole
Alex G303, 48-hole
Spokes
14ga. (2.0mm)
14ga. (2.0mm)
Spoke Nipples
Brass
Brass nipples
Front Tire
20 x 2.10" 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.