Can't speak for tread life on the present non RFT's versus the RFT's but the everyday living with the non RFT's is vastly superior. I'm assuming that I will most likely do as well as the Lattitude RFTs that were on my '08. They got to around 40k if memory serves so evidently the Proxes outperform that, but it doesn't matter to me, I wouldn't buy them.

I've got 19's on my '10 35d and the slamming harshness experienced with the RFT's is gone.Yes, there is a bit of loss of turn in response and a bit more body roll, but these characteristics are not that important to me for this vehicle which is my rolling office, now at 62k miles.