Velopedia Bicycle Archive

Compare Bicycles

Compare published geometry, gearing and specifications for up to three bicycles.

1 of 2 bicycles

At a glance

Key differences

Supported differences are shown below. Data limitations are labeled separately.

  1. Data limitation

    No geometry is recorded for 2007 GT Power Series Expert and 2006 GT Power Series Expert.

  2. Gearing

    2006 GT Power Series Expert has a 13% lower climbing ratio than 2007 GT Power Series Expert.

    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.

2007 GT Power Series Expert42T · 14T · 1-speed
Ratio3.00:1

Speed unavailable: wheel or tire size is missing or unclear.

2006 GT Power Series Expert42T · 16T · 1-speed
Ratio2.63:1

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.

Try other gearing

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.
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Specification
2007 GT Power Series Expert
2006 GT Power Series Expert
Overview
Model Year
2007
2006
Brand
GT
GT
Model
Power Series Expert
Power Series Expert
Bicycle Type
BMX
BMX
Original MSRP
$399.99
$369.99
Colors
Blue/Black
Team Blue/Silver two tone
Sizes
20" wheel
20" wheel
Weight
—
—
Frameset
Frame Construction
TIG-welded
TIG-welded
Frame Material
6061 T6 aluminum
6061 T6 aluminum
Fork
GT BMX design
GT BMX design
Fork Material
Aluminum, unicrown crown
Aluminum/chromoly
Drivetrain
Component Group
BMX Mix
BMX
Crankset
GT forged aluminum 3pc., 42 teeth
AC Mini LE forged aluminum 3pc, 42 teeth
Bottom Bracket
Euro cartridge
European size sealed cartridge bearing
Rear Cogs
1-speed, 14 teeth
1-speed, 16 teeth
Chain
KMC Z610
KMC Z610
Pedals
Jr. BMX platform, aluminum
Jr. BMX platform, aluminum, Cr-Mo axle
Brakes
Brakes
Alloy side-pull caliper front/Tektro, 926AL rear brakes, Tektro 316A levers
Alloy side-pull caliper front/Tektro, 926AL, Mini V-brake, cold forged aluminum rear brakes, Tektro, 316A, aluminum 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 design, aluminum, 6.7" rise
Handlebar Extensions
Not included
—
Stem
GT BMX Race
'05 GT BMX Race design, cold forged aluminum, 1-1/8"
Saddle
GT Mini
GT mini design, padded with integrated aluminum post
Seatpost
Aluminum, 22.2mm (7/8 inch) diameter
Aluminum, 22.2mm (7/8 inch) diameter
Wheels & Tires
Hubs
Front: GT BMX sealed, Rear: BMX Race cassette
GT BMX race design, aluminum body, sealed cartridge bearings
Rims
Sun M13-II, 32-hole
Sun M13-II, double wall, aluminum, 32 hole, eyelets, 32-hole
Spokes
15ga. (1.8mm) straight gauge
15ga. (1.8mm) Straight Gauge
Spoke Nipples
Aluminum nipples
Aluminum nipples
Front Tire
20 x 1-3/8" Kenda Small Block Eight
20 x 1-3/8" Kenda Krankit
Wheel Size
20" wheels
20" wheels

Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.

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