Hi, I was wondering what could be wrong with shifters as occasionally when going hard uphill they sort of have no tension when trying to shift down and the cables were replaced not so long ago. It's the shimano tiagra 9 speed, don't know if it's a problem with the shifters or with the RD. Before I take the bike in for a complete service, would like to know if there was anything I could perhaps do to sort it out. Thanks Zang2009-05-12 07:18:09