If the Bianchi is comfortable over the same longer distances try this. Make sure your saddle is set correctly for leg extension and knee over spindle. Then try and get the handle bars to the same saddle to bar length on the Lemond that they are on the Bianchi.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk