I put a LT on my hard tail mountain bike this spring and it instantly doubled the amount of time I could ride. Yesterday, I put the ST model on my R20. The hardest elastomer(they put numbers, not colors on the new ones) coupled with the Brooks B66 provides a cushy yet firm ride. The saddle springs still give left and right as I pedal and the Thudbuster isn't noticable. Two hours into a ride down patchwork roads and I noticed I'm not the least bit sore.