I've got a 5 year old hub, changed the oil last year. I have recently found it hard to turn the twistgrip either up or down. If I undo the bayonet connectors, it is smooooth and easy to turn the shifter, so it must be more towards the hub where the stiffness is coming from.
Has anyone had this happen to them, and do you know how to cure it?
Hope someone can help.