Introducing the Rimpact TMD: The first internally installed mass damper for Mountain Bikes. The TMD reduces vibrations, and fatigue whilst elevating confidence and composure. What is a TMD? A commonly used device that reduces the amplitude and duration of vibrations in a greater system or structure Does it make you faster? Yes. Rimpacts testing has shown that on average, riders are around one second per minute faster in blind, timed, A/B Placebo testing. Whilst this might not sound like much, extrapolating this out on a long DH track or a full Enduro day this advantage can make the difference from placing mid-pack to being at the sharp end of the finishers. Tunable for you! TMD ships with soft, medium and firm spring rates. Easily change out the springs to fine tune to your riding preferences. Check out all the specifics from Rimpact!