Yes but you do have to move the seat forward a little...
I have a thing about the passenger seat being forward of the driver seat when no passenger is there. I feel like someone is there but not really, like a presence!

We travel 10 days with our R59 and the car was packed, including behind the passenger seat which is most convenient to access on hand items... long distance is when I want a spare. That's just me

 

I had a a compact spare stored behind the back seat in my R53. I was able to use ratchet straps to hold the tire tight to the back of the seat, using the rear headrest rod for one of the strap hooks to connect to. Worked well and still had plenty of room. If you use a compact spare remember to run it on the rear wheel only..

With the vert, for now I am staying with runflats.

 

I just carry a small air compressor, some tire plugs, and a bottle of slime.

 

If you have a roof rack, strap the spare up there. It'll look stupid, but if you insist on an unnecessary spare tire...

 

I personally carry a mini (no pun intended) air compressor, and a can of Fix-A-Flat, since I no longer have run-flats on.

I hope to never have to use the fix-a-flat, but if I have nowhere else to go, or maybe I cannot call AAA or something because of bad reception, I'll use it, provided the sidewall is not destroyed or anything. Otherwise, I might be screwed. I could also work on my hitchhiking skills.

 

A tire plug kit, such as BlackJack's, will give you a permanent repair which will last the life of the tire.

 

Easy. Tire Repair Kit. Learn how to plug a tire. Last the life of the tire if it's not in the sidewall. Second a air compressor with sealent. SLIME makes a good kit. I use it to top my air pressures off monthly. You will be fine. I have never needed a spare. Just keep an eye on things.

 

When I ditched my runflats, I bought a "MINI Mobility Kit", basically a black zippered bag with a small 12v air compressor, a can of slime, and some nifty gloves. I upgraded that recently to include a few Blackjack tire plugs, and the 2 tools needed to ream the puncture and install the plug. Now that I think about it, a pair of dikes should be in there as well for most folks, to remove any nail or screw from the tread. I always have a Leatherman tool on my belt, I think that will suffice for me. Of course, any kind of sidewall puncture or complete blowout will leave me stranded, just hoping I have cell service to ring AAA.

 

Having ditched my own RF tires, I'm another who carries a small compressor as well as several Safety Seal plug strings with insertion tool in the compressor carry bag.
http://www.safetyseal.com/

 

AAA Premier membership.
100 miles towing!!

 

Carry a craftsman cigarette lighter plug in tire pump and a plug kit.