I use three.

(Just to take extra extra extra care not to drop a wheel on the
ceramic rotors.)

I used two and decided, correctly, that three is better. It doesn't
take any longer and it's an easier process.

Thought I would share...

- Mark

PS: I keep them in the car even though I have no jack/spare/etc.
(which really annoys me)

If I had a spare, though, there is the problem of what to do with the
road wheel while running on the spare. Especially if the GF is with
me. I somehow don't think she would be too wild about holding
the tire/wheel in her lap on the way to the tire store.

So my current plan is to leave her there where the flat occurred, chain
her to a tree or a power pole so she won't wander off and get lost,
place the tire/wheel in the passenger seat, get it replaced and come
back for her.

Do you all think that's a good plan? (assuming I can find a spare!)

__________________
Rare Cayman Cabriolet S in Meteor Gray,
Cocoa top, Cocoa full leather interior, Sport
seats and steering wheel, PCCBs, PSE,
real Cayman 18 inch wheels and a delightful
3.4L engine with a new set of lifters which
seems to have solved the ticking noise.