- Frame
- Chromoly
- Brakes
- Tektro FX-15 U-brake rear brakes, Tektro 275A rear levers
Velopedia Bicycle Archive
Compare Bicycles
Compare published geometry, gearing and specifications for up to three bicycles.
Edit comparison
Add a bicycle
Search the Archive without leaving this comparison.
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 2009 GT Calafia and 2008 GT Calafia.
- Data limitation
Only 2009 GT Calafia 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.
Ratio2.75:1
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 Calafia
2008 GT Calafia
Overview
Model Year
2009
2008
Brand
GT
GT
Model
Calafia
Calafia
Bicycle Type
BMX
BMX
Original MSRP
$549.99
$499.99
Colors
Yellow
Army Green
Sizes
21" TT
One size fits all
Weight
—
—
Frameset
Frame Construction
TIG-welded
TIG-welded
Frame Material
Chromoly
GT Cro-moly BMX freestyle design
Fork
GT Dirt/Street
GT Freestyle
Fork Material
Chromoly, unicrown crown
CrMo Steel, unicrown crown
Drivetrain
Component Group
BMX
BMX
Crankset
GT Tubular Cr-Mo 3pc., 33 teeth
—
Bottom Bracket
Mid sealed BB
Mid BB
Cassette
Cassette cog
—
Rear Cogs
1-speed, 12 teeth
1-speed, 12 teeth
Chain
KMC Z510HX
KMC Z510HX
Pedals
GT Dirt/Street platform
GT Dirt/Street platform
Brakes
Brakes
Tektro FX-15 U-brake rear brakes, Tektro 275A rear levers
Tektro FX-15D rear brakes, Tektro 275A rear levers
Cockpit & Contact Points
Headset
1 1/8" TH #8 integrated
1 1/8" Impact Integrated
Handlebar
GT dirt/street Cr-mo
GT dirt/street Cr-mo
Handlebar Extensions
Not included
Not included
Stem
GT FS design
GT FS design
Saddle
GT Slim
BMX mini street
Seatpost
Aluminum micro-adjust double bolt
Aluminum micro-adjust
Wheels & Tires
Hubs
Front: GT aluminum sealed, Rear: Joy Tech cassette
Front: GT sealed, Rear: Joy Tech cassette
Rims
Alienation Black Sheep, 32-hole/36-hole
Alex Supra Dome, 36-hole
Spokes
Stainless, 14ga. (2.0mm)
Stainless steel, 14ga. (2.0mm)
Spoke Nipples
Brass
Brass nipples
Front Tire
20 x 2.10" Kenda Kiniption
20" Kenda Kiniption
Wheel Size
20" wheels
20" wheels
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.