BikePedia - Bicycle Value Guide
GT Marathon Pro M 2008 -
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GT introducing 2009 Golden Bike series - BikeRadar
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BikePedia - Bicycle Value Guide
GT Marathon Sport reviews and prices - Full suspension bikes
2008 GT Marathon 2.0 - Bicycle Details - BicycleBlueBook.com
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17" Medium GT Marathon Full Suspension Fox Aluminum Disc Mountain Bike 5'7"-5'10"
