Having ditched my RFTs, I have been on the lookout for a mini spare tire solution for some time now. I could lug around one of my winter wheels, but that really takes up too much trunk space. I don't really need a spare for my daily urban driving being that I have a cell phone and all, but I do take a few road trips a year, and having the option of putting a spare in the trunk gives me peace of mine. That Leather-Z kit is complete, but it's stupid at $450. Come on. Luckily, a guy over at Bimmerfest.com (thread) did some poking around and found that the OEM E60 retrofit spare kit (PN: 36 11 0 308 889) works on most E9x setups. Tischer BMW sells them for $275 shipped. I got mine last week, and it works great on my 2006 330xi with sport package. Worth a mention for those in the same boat. Do read the fine print on the post, however. Some setups have brakes that are too big for the spare to clear. Rick