A steering assembly for a mounted bicycle is disclosed herein. The steering assembly includes a support base and at least one omnidirectional roller assembly extending from a bottom surface thereof. The at least one omnidirectional roller assembly is operatively disposed in direct contact with a ground surface and is structured to facilitate movement of the support base along the ground surface in a plurality of different arcuate and linear paths to accommodate varying trail measurements of a bicycle. The varying trail measurements of the bicycle are defined by varying angles of the bicycle relative to the ground surface during operative use of the steering assembly.