Join Date: Jun 2005
Location: South of Raleigh, North of New Hill, East of Harris Lake, NC
Bikes: Specialized Tarmac, Speialized Roubaix, Giant OCR-C, Specialized Stumpjumper FSR, Stumpjumper Comp, 88 & 92Nishiki Ariel, 01 Bianchi Campione, 87 Centurion Ironman, 92 Paramount
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The front derailer could have several problems. It could be a cable that's jamming or rusted, or it could be dirt in the derailer, or it could be the low limit screw is set incorrectly. Try lubing the derailer with chain lube. If that doesn't work, with the left (front) shifter set in first (small) gear push on the derailer to see if it moves in and shifts the chain. If it won't shift, try backing off on the low limit screw and see if that helps.
I'd like to see pics of a Univega MTB. They are not common.
BTW, $30 is a good price for that bike.
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