if you haven't ridden since the fall and the temps have changed, I'll bet your tires also have a lot lower pressure unless you pumped them up before you went riding. Give that a look
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Bikes: 1996 Eddy Merckx Titanium EX, 1989/90 Colnago Super(issimo?) Piu(?), 1990 Concorde Aquila(hit by car while riding), others in build queue "when I get the time"