sergen said:My bike has full ultegra components - brakes, FD, RD, triple hollowtech chainring and a 12-15 CS6600 cassette.
I know that Shimano's official line is to not go any lower than a 27 but recent forum users have suggested that this is just Shimano being conservative and that the rear derailleur could probably handle a 29T sprocket. Indeed, given that I never cross-chain I wouldn't have to worry about getting a new chain to cope with 52x29. I simply wouldn't use that ratio.
But since Shimano don't manufacture a sprocket any lower than 27T, what cassettes are available on the market that would allow me to get a 30x29 gear? I'm obviously looking for something that would not cause shifting problems with Ultegra components.
Many thanks
I regularly use a 30 - 28 set up for the mountains here and I can´t see that going to 29 would help much - now the difference between 25 and 28 is noticable but you do start to get into stability issues riding slower than the 28 ( mtb with slicks and 22 inner ring ) and it´s just easier to walk than wobble like that ; you seem to spend more time steering than pedeling .