Quote:
Originally Posted by cna90
Well in that case even the donut spare won't help you either! You need a full size spare tire for long drives!
It's recommended on the side wall that only drive 50miles/80kms on the donut as well. Specially cars with xDrive, longer driving will damage the transfercase.
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Many years ago when the little donuts or doughnuts had come out into popular use as OE spares, Car & Driver did a review of them, how well they handled, how long they lasted, etc. It was quite surprising how well they did. I suspect that the 50 mile recommendation gives you a huge safety margin, although if the total tire diameter is different from the OE tires, then yes, I can see some distress occurring from the differential(s).
I can't remember exactly if my F10 had a spare (I think it did) and I know my F01 had one, but I think those were the last BMWs to do so. It's a darn shame that these cars are no longer designed with room to store a full-size spare. These are family cars, perfect for long journeys, and yet we can't use them for that without some worry about what may happen if you get a flat.
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Current inventory:
F22 & G05
Cadillac CT5-V Blackwing w/3 pedals
Past: E24,E28(3),E34,E36,E37,E38(2),E39(4),E46,E89,E92 (obviously),F01,F06,F10,F30,F87,G12,G30(2),G82(2)