About 6000 miles ago, I replaced both front and rear sprockets and the chain with a DID Gold X Ring set.
I've had up to 18,000 miles out of a chain and sprocket set before, I've always kept the tension adjusted properly and have a Scotoiler on it to keep it lubed, but the front sprocket has become noticably hooked. The rear is ok and so is the chain.
I know the advice is to always change the whole lot in one go, but is this really necessary? I've read that the front tends to wear more than the rear, so can I just put a new front one on?