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 2004 GT Power Series Jr. and 2003 GT Power Series Jr..
- Gearing
2003 GT Power Series Jr. has a 6% lower climbing ratio than 2004 GT Power Series Jr..
A lower ratio gives more mechanical advantage; rear-wheel rollout determines distance per crank turn.
Gearing comparison
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
RPM = pedal turns per minute.
Ratio2.53:1
Speed unavailable: wheel or tire size is missing or unclear.
Ratio2.38:1
Speed unavailable: wheel or tire size is missing or unclear.
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
2004 GT Power Series Jr.
2003 GT Power Series Jr.
Overview
Model Year
2004
2003
Brand
GT
GT
Model
Power Series Jr.
Power Series Jr.
Bicycle Type
BMX
BMX
Original MSRP
$299.99
$299.99
Colors
Blue
Avus Blue
Sizes
Junior
One
Weight
—
—
Frameset
Frame Construction
TIG-welded
TIG-welded
Frame Material
6061 T6 aluminum
6061 T6 aluminum
Fork
GT
GT
Fork Material
Chromoly, unicrown crown
Chromoly, unicrown crown
Drivetrain
Crankset
3-piece aluminum, 38 teeth
GT 3-piece chromoly, 38 teeth
Bottom Bracket
Sealed cartridge
Sealed cartridge
BB Shell Width
68mm English
Euro
Rear Cogs
1-speed, 15 teeth
1-speed, 16 teeth
Chain
KMC Z30, 1/2 x 1/8"
KMC Z30, 1/2 x 3/16"
Pedals
Aluminum
Aluminum
Brakes
Brakes
Tektro 926A Mini V rear brakes, Tektro 316A rear levers
Tektro 926A Mini V rear brakes, Tektro 316A rear levers
Cockpit & Contact Points
Headset
1" Semi integrated threadless
1" Semi integrated threadless
Handlebar
GT Mini BMX
GT Mini BMX
Stem
GT Mini Piston
GT Mini Piston
Saddle
GT Mini
GT Mini
Seatpost
Aluminum, 22.2mm (7/8 inch) diameter
Aluminum, 22.2mm (7/8 inch) diameter
Wheels & Tires
Hubs
GT Mini
GT Mini
Rims
Alex DR-13, 28-hole
Jalco GT-02T, 28-hole
Spokes
Steel, 15ga. (1.8mm) straight gauge
Steel, 15ga. (1.8mm) straight gauge
Spoke Nipples
Aluminum nipples
Aluminum nipples
Front Tire
20 x 1 1/8" IRC Siren
20 x 1 1/8" GT Brody Knobs
Wheel Size
20" wheels
20" wheels
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.