That is the theory…I have, like I am sure many others, experienced the reality. A while back I had a flat, had to wait 2 hours for the RAC to get to me, they spent 15 minutes telling me I would have to wait for a recovery truck to pick me up because they didn’t have any suitable spares available. I then waited another 3 hours for a recovery truck and finally got home at 1.30am. Rang quick fit mobile and a couple of days later and got it sorted. A space saver would have helped avoid all the stress of waiting on the side of the road.