Bargains?

[darrsi]

The disc bolts should have thread-lock on them which makes them difficult to undo. You need to give each bolt plenty of heat to release the thread-lock. They are still a devil to get undone and normally make a good crack noise when they start to turn.
When you put a new disc on it's best to also use new bolts with thread-lock, you can use your old bolts if they came out ok and the Allen bolt heads haven't gone sloppy but new ones don't add too much to the cost and I've always thought that bolts that have been heated are weaker which is not a good idea on the most important part of your bike.

Firstly, do they even need threadlock, 'cos i seriously cannot imagine them ever coming loose if torqued properly?
And secondly, as the disc is being changed, would it not be a great idea to take the bike for a spin and use a lot of rear brake, because that will heat all the disc bolts up anyway!