Some of the donuts for AWD cars are full diameter, but stored uninflated - a small air compressor is also supplied which is used to inflate the donut if/when it is needed.
Originally Posted By: Rand
Originally Posted By: dailydriver
Originally Posted By: Jarlaxle
Originally Posted By: rslifkin
With a donut, you're not supposed to put it on the drive wheels. Ever. You're supposed to put it on the non-drive end and then move a tire from there to the drive end.
Pablum.
IF the 'donut' is a MUCH smaller overall diameter than the stock set up (like mine was), and you have a clutch pack type limited slip diff (maybe even a worm gear/Torsen type as well?), you CAN hurt/quickly wear the diff with that combo on the rear axle.
He said NON-Drive wheels which covers that.
YES, I know.
I was addressing Jaraxle's "Pablum" response with my post.