This might sound ridiculous but what is a tyre boot? Heard of them but don't have one or yet needed one. Thanks Gerry
its a small section of old tyre that can be put between the tyre and tube to stop the tube bulging out through a damaged section of tyre so you can get home, typically you put the replacement tube in, inflate it and it bulges out through the damage on the tyre then goes bang a few yards up the road so you put in a tyre boot to stop that happening.
When I destroyed my rear Race Lite on a large piece of debris on my way back from Banbury last summer it was a tyre boot that got me home, the debris destroyed the inner tube, snake bite puncture, and left a gash in the side wall of the tyre.
These pictures aren't great but you can see the two holes in the tube and the gash in the tyre.