I don't have the off-road wheels, but I am having a problem with leaks. One has a small hole, but the other 3 have been tested twice and Nissan can't find a leak. Somehow they lose up to 5 psi a week, and my pressure warning light stays on 6 out of 7 days a week. I mentioned the TSB about the sensors causing leaks, but they insisted that I don't have a leak. Needless to say, I got a portable air compressor for Christmas ;-)
If you have any luck with the two that are leaking, please do share. It is a pain in the @$$ messing with these tires every other day!!
I read a bulletin today about the slow leaks. It can also affect the street tire versions. The problem is a leaky seal around the low tire pressure warning transmitter. The tire has to be broken down and a new seal installed. There is a dealer bulletin out on this problem.