Frame Size Question??? I'm looking for a cross frame. I rode a 60cm Eddy Merckx road frame back in the 80's. I ride a "Large" Giant TCR-1 road frame now... I'm looking to get into Cyclocross and am having some "Sticker Shock" with the new bikes! I have straddled Trek and Scott Road Bikes and it looks like a 58 is pretty nice... so my question is should I ride a 60cm or go 58 on a used frame?