If your Bullitt commute includes lots of bumpy paths or steep descents that throw you into a "speed wobble", consider adding the Damper Kit to your cargo bike. Originally designed to stabilize motorcycle steering, Bullitt's hydraulic damper kits are produced in Japan and attach to the frame and fork using a CNC-machined mount. The sealed bearings and fully adjustable preload add to its durability. It is not a suspension system, but makes your Bullitt more robust for heavy cargo, touring, and roads that make typical bikes quake in their boots.