Abstract: A stem includes a quill with a quill length extending along an axis. A first quill end has a cradle configured to couple to a handlebar, and a second quill end has helical slots opposite one another. A base has a base length extending along the axis. The base is configured to receive the quill. A first base end has a bracket configured to couple to a steering mast. The base has apertures opposite one another, and a second base end has a groove extending along the axis. A pin is coupled to the base perpendicular to the axis through the apertures. A releasable clamp is sized to fit around a base outer diameter. The helical slots are configured to receive the pin and slidably guide the pin along the helical slots of the quill such that the quill is rotatable within the base and relative to the base.

Abstract: An improved cantilevered-beam seat particularly suitable for a tubular-metal bike-frame, wherein the essential generic TitanFlex.TM. embodiment includes four generic variances. The first embodiment comprising a titanium-frame, having an integrally-formed cantilevered tubular-beam projecting aft from top of head-tube, which length and intermediate fulcrum-stanchion are tuned to deliver a fixed degree of deflection for an average rider whose seat is adjustable fore/aft thereto. The second version embodies the same structure, wherein is provided a special concealed carbon-fiber dampener-tube having a finely tapered trailing-end, fitted within the titanium beam; -lending a suitable amount of resonate-dampening to the natural cantilivered-beam springiness. The third version adding a special ASAP (adjustable shock-absorption platform) DialRide.TM. device; enabling rider to advantageously fine-tune the longitudinal spring-rate position of the previously mentioned internal dampener-tube, -on-the-fly.

Abstract: An aerodynamically configured face-shield suitable for sports-helmets or other similar head protective gear, which is inexpensively die-cut and readily conforming to the frontal vertical-brim region of an existing visorless-helmet via special mounting elements. The vestigial low-profile mounting-elements are non-intrusive, and permanently install via double-face mounting-tape, as extruded-plastic strips having elongated-bifurcations which are manually swedged into corresponding die-cut attachment-slots at opposite lateral sides of the helmet brim. Thus attached, the special faceshield is held rigidly in position against physical forces such as are encountered during bicycling; yet, may be instantly avulsedly detatched by the user merely pulling the faceshield away from the brim mount-strips. This unique mounting methodology virtually eliminates potentially injurious fasteners heretofore employed in faceshield hardware design; plus, it presents an aerodynamically superior conformation.