Hidden inside your steerer tube, the TMD (Tuned Mass Damper) is a suspended mass that manages vibrations and calms the bike, reducing fatigue and giving you more control when it matters most. By absorbing unwanted vibrations before they reach you, your hands, arms, and brain stay fresher for longer, so you can stay focused on the trail instead of fighting fatigue. Beyond comfort, the TMD also boosts confidence on the bike. By smoothing out vibrations, it delivers a calmer, more predictable ride that lets you push harder with greater control. Best of all, it's easily installed and securely fitted inside your fork's steerer tube, so you get all these benefits without any bulky add-ons or complicated setup. Specs No Tuning Required: Carefully chosen springs with extended travel allow the mass to respond to inputs quicker than ever and offer increased composure through the biggest hits End Stroke Control: V2 introduces end-stroke elastomers to add even more composure and control on the biggest hits. Weight: Unit weight-420 grams, mass weight-250 grams Compatibility: Optimised for bikes and e-bikes with a steerer length of 180mm+. If your steerer shorter than this, you will need spacers above the stem to be compatible. Aluminium and Steel, Tapered and 1 1/8”, oval or cylindrical steerers are all compatible. For use on single and dual crown forks. Servicing: TMD is designed so the springs never use more than 80% of their available travel. By avoiding full compression, spring life is significantly extended and replacement is rarely required. Installation Guide: https://www.rimpactmtb.com/tmd-installation-guide