- It sucks ass getting a flat in a car on a long trip, since most modern cars have a toy tire, or worse, tire goop and an inflator ("clown shoes" as I like to call it). Many SUVs offer a full size spare--extremely handy!
One can purchase a full size spare and doing so is cheaper than buying an SUV for the option of a full size spare.
Hope you don't ever intend to carry anything, because a full size wheel likely won't fit where the skinny wheelbarrow tyre of a spare used to be. There's a reason they're called space savers.
I absolutely HATE HATE HATE those things. AC is right, those things suck major balls. I used to get a lot of punctures because the street where I lived was basically a tip strewn with rubbish (there was an alleyway where people would dump things, then bored yobs would come along and smash the things). Wasn't uncommon to start the day with a flat tyre.
Space saver spares are no good if you do a lot of motorway driving like I do, because you can't go over 50mph with them. Get used to having lorries tailgating you because to them it seems like you're just needless slowing down traffic. The sensible thing to do in that situation is wait for a tyre shop to open and get it fixed before going to work but then you'll have your asshole boss bitch at you for being late (and he's terribly suspicious about yet another flat tyre...). I know that you're supposed to use the compact spare to go to the nearest tyre shop ASAP to get the proper wheel fixed, because it's a scientifically proven fact that punctures only ever happen during business hours and everyone knows the location of all tyre shops throughout the country. It's impossible to get a puncture after 5pm...
Remember I wrote that the fullsize wheel won't fit where the compact one is? You'll have to put it in the boot (trunk), hope you were not carrying anything there. Enjoy having the filthy wheel muck up the boot. In my last car the wheel wouldn't even fit in the boot unless the rear seats where put down. I guess I'm supposed to just dump my rear passengers (and their stuff in the boot to make room for the wheel) on the side of the road.
In summary, fuck compact spares. Next time I'm car shopping those things are going to be a deal breaker for me.