I don't carry the spare with me either. I don't have the bolt to hold it down and I got sick of hearing it bang around. I don't have a jack or toolkit either. Dstocks, I'm looking in your direction. :p
If I'm lucky it might be considered a defect and I'll get a replacement for free. I don't want to replace all 4 yet, they still have some decent tread left.
Moral of the story: A space saver looks stupid.
