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 2007 GT Power Series Expert and 2008 GT Power Series Expert.
- Data limitation
Only 2007 GT Power Series Expert 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.
Ratio3.00:1
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
2007 GT Power Series Expert
2008 GT Power Series Expert
Overview
Model Year
2007
2008
Brand
GT
GT
Model
Power Series Expert
Power Series Expert
Bicycle Type
BMX
BMX
Original MSRP
$399.99
$399.99
Colors
Blue/Black
Silver/Black
Sizes
20" wheel
Expert 19.75"TT
Weight
—
—
Frameset
Frame Construction
TIG-welded
TIG-welded
Frame Material
6061 T6 aluminum
GT 6061 Aluminum
Fork
GT BMX design
GT Aluminum
Fork Material
Aluminum, unicrown crown
Aluminum, unicrown crown
Drivetrain
Component Group
BMX Mix
BMX
Crankset
GT forged aluminum 3pc., 42 teeth
GT forged aluminum 3pc.
Bottom Bracket
Euro cartridge
Euro
Rear Cogs
1-speed, 14 teeth
1-speed, 14, 15, 16 teeth
Chain
KMC Z610
KMC Z610
Pedals
Jr. BMX platform, aluminum
Jr. BMX platform, aluminum
Brakes
Brakes
Alloy side-pull caliper front/Tektro, 926AL rear brakes, Tektro 316A levers
—
Cockpit & Contact Points
Headset
1 1/8" integrated FSA Orbit IS-2
1 1/8" FSA Orbit IS-2
Handlebar
GT BMX aluminum
GT BMX aluminum
Handlebar Extensions
Not included
Not included
Stem
GT BMX Race
GT BMX Race
Saddle
GT Mini
GT Mini BMX
Seatpost
Aluminum, 22.2mm (7/8 inch) diameter
Aluminum
Wheels & Tires
Hubs
Front: GT BMX sealed, Rear: BMX Race cassette
Front: GT aluminum sealed, Rear: Joy Tech cassette
Rims
Sun M13-II, 32-hole
Alex DA-22, 32-hole
Spokes
15ga. (1.8mm) straight gauge
15ga. (1.8mm)
Spoke Nipples
Aluminum nipples
Aluminum nipples
Front Tire
20 x 1-3/8" Kenda Small Block Eight
20" 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.