I have a set of clincher 404's from '03 and was thinking of getting a rear 808 for Placid. Here's the question:

How do those of you who race with a clincher 404 in the front and clincher 808 in the rear race with extra tubes in case of a flat? Do you carry one extra tube with extender for 808 and another shorter one for the 404 or do you simply take the extender off the respective tube and put it on a new one if you flat? What's the quickest method that you've come up with? Thanks in advance.

PS Hold off on the tubular vs clincher debate for now, please.