I have a Shimano triple bottom bracket chain ring SG A 52. The rear shiftier is also a Shimano Ultegra 9 ring sprocket. Despite a tune up at my LBS the chain is skipping on the rear sprockets. I have a few thousand miles on the bike and think a new chain could solve thee problem. I counted the chain links and there are 54 (i.e. 54 x 2 = 108). Does anyone know what chain I should order for this 2004 Cannondale R1000? Thanks, adkron

FC 6503?