Velopedia Bicycle Archive
Compare Bicycles
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 2007 GT Power Series Jr..
- Data limitation
Only 2004 GT Power Series Jr. has enough published drivetrain data for gearing calculations.
- Identity & price
2004 GT Power Series Jr. had an original MSRP $100 lower than 2007 GT Power Series Jr..
Original MSRP is the published list price when new, not today’s used-bike value.
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.
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
2004 GT Power Series Jr.
2007 GT Power Series Jr.
Overview
Model Year
2004
2007
Brand
GT
GT
Model
Power Series Jr.
Power Series Jr.
Bicycle Type
BMX
BMX
Original MSRP
$299.99
$399.99
Colors
Blue
Blue/Black
Sizes
Junior
20" wheel
Weight
—
—
Frameset
Frame Construction
TIG-welded
TIG-welded
Frame Material
6061 T6 aluminum
6061 T6 aluminum
Fork
GT
GT BMX design
Fork Material
Chromoly, unicrown crown
Aluminum/chromoly, unicrown crown
Drivetrain
Component Group
—
BMX Mix
Crankset
3-piece aluminum, 38 teeth
GT forged aluminum 3pc.
Bottom Bracket
Sealed cartridge
Euro cartridge
BB Shell Width
68mm English
—
Rear Cogs
1-speed, 15 teeth
1-speed, 14 teeth
Chain
KMC Z30, 1/2 x 1/8"
KMC Z610
Pedals
Aluminum
Aluminum body with bolt on aluminum cage
Brakes
Brakes
Tektro 926A Mini V rear brakes, Tektro 316A rear levers
Alloy side-pull caliper front/Tektro, 926AL rear brakes, Mini BMX levers
Cockpit & Contact Points
Headset
1" Semi integrated threadless
1" integrated FSA Orbit IS-2A
Handlebar
GT Mini BMX
GT BMX aluminum
Handlebar Extensions
—
Not included
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
Front: GT BMX sealed, Rear: BMX Race cassette
Rims
Alex DR-13, 28-hole
Sun M13-II, 28-hole
Spokes
Steel, 15ga. (1.8mm) straight gauge
15ga. (1.8mm) straight gauge
Spoke Nipples
Aluminum nipples
Aluminum nipples
Front Tire
20 x 1 1/8" IRC Siren
20 x 1-3/8" Kenda Small Block Eight
Wheel Size
20" wheels
20" wheels
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.