I have a TRD sport and travel two hours a day on the highway for work and currently have 2300 miles and I have never had any vibration that is not normal with a truck traveling on a road.
Yea I've really been hearing about the 5100's, has anybody seen those things be put to the test, I don't think I would ever get to that point but it would be cool to know how durable and good they are for a good hill climb, any pics would be cool too.:D