Leaky valve stems

Hi all,



Lookin for some advice from the rtv brain trust.



I noticed my rtv starting to buck a bit at high speed and checked the tire pressure. Every valve stem leaked, in fact every valve stem could be turned by hand and I could have deflated them by simply pushing against them. It's strange that this seems to have happened all at once. The tires are the originals and 8 years old (but only have 75 hours on them).



Anybody ever have all their valves go bad at once?



Anyone have a trick for installing new valves without breaking the bead (or the bank on new tools?



Thanks in advance for ideas



Treehouse (aka Ben)

Leaky valve stems