I started using the thudbuster ST on my road bike and the LT on my HT 29'er. On both bikes it made a huge difference by soaking up the road noise and vibrations. After a long distance ride on both bikes I feel much less tired. Although the TB cannot be compared to a FS mtb, from what I have experienced now it certainly adds a small amount of traction to my HD thus improving performance. The constant pounding on your back due to small never ending obstacles such as roots, grass humps etc is dampened alot. One still have to stand over larger obstacles though.
