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 2011 GT Power Series XL and 2008 GT Power Series XL.
- Data limitation
Only 2011 GT Power Series XL 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
Rear tire: 20×1.75.
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
2011 GT Power Series XL
2008 GT Power Series XL
Overview
Model Year
2011
2008
Brand
GT
GT
Model
Power Series XL
Power Series XL
Bicycle Type
BMX
BMX
Original MSRP
Not documented
$549.99
Colors
White/blue
Silver/Black
Sizes
—
Pro XL
Weight
—
—
Frameset
Frame Construction
Aluminum
TIG-welded
Frame Material
6061-T6 aluminum
GT 6061 Aluminum
Fork
GT BMX
GT Aluminum
Fork Material
Steel
Aluminum, single crown
Drivetrain
Component Group
BMX Mix
BMX
Crankset
CroMO 3 piece, 44T teeth
TruVativ Racing XR
Bottom Bracket
Euro
TruVativ Gigapipe DH ISIS
Cassette
ACS Claws
—
Rear Cogs
16 teeth
1-speed, 14, 15, 16 teeth
Chain
KMC Z610HX
KMC Z610HX
Pedals
GT BMX platform
GT Alum Platform with cr-mo spindles
Brakes
Brakes
—
Alloy side-pull caliper front/Tektro 930AL rear brakes, Tektro 319 levers
Cockpit & Contact Points
Headset
1 1/8" Semi integrated
1 1/8" Semi integrated
Handlebar
GT BMX Race
GT BMX cro-moly
Handlebar Extensions
Not included
Not included
Stem
Cold forged GT drop
GT BMX Race
Saddle
GT BMX "ProLite"
GT Pro Lite
Seatpost
Aluminum micro-adjust, 27.0mm diameter
Aluminum micro-adjust
Wheels & Tires
Hubs
Front: GT BMX branded, Rear: Joy Tech 21
Front: GT aluminum sealed, Rear: Joy Tech cassette
Rims
Jalco DDY, 36-hole
Alex Supra Dome, 36-hole
Spokes
14ga. (2.0mm)
14ga. (2.0mm)
Spoke Nipples
Brass
Brass nipples
Front Tire
20 x 1.95" Kenda Small Block 8
20" Kenda Small Block Eight
Rear Tire
20 x 1.75" Kenda Small Block 8
—
Wheel Size
20" wheels
20" wheels
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.