Bike Junkie
Join Date: Jun 2005
Location: South of Raleigh, North of New Hill, East of Harris Lake, NC
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Bikes: Specialized Tarmac, Specialized Roubaix, Giant OCR-C, Specialized Stumpjumper FSR, Stumpjumper Comp, 88 & 92Nishiki Ariel, 87 Centurion Ironman, 92 Paramount, 84 Nishiki Medalist
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I'm sure others will add comments, but when I buy a used bike and the chain is gummed up from dried out lubricants and dirt, it exhibits all the symptoms you described. If you have not cleaned the chain, I would thoroughly clean it, off the bike, before making any adjustments or other changes. Also, check the chain to be sure it is not stretched and out of spec.
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