If you haven't used your spare tyre in a while, it might be worth double checking you can actually get it out if needed! One of my front tyres was flat this morning, got a screw in a tyre that's only been on a few months! Thought it would be a 5 minute job to chuck the spare on. Nope! Not too sure if the spare was wet the last time I used it a few years ago, but there's a bit of rust in the spare wheel well so the screw that's used to secure it wouldn't budge. Had to take a slightly descructive route to remove and break the 2 plastic pieces.