I used one for a decade and a half, for tools and spares, windbreaker/rain top, etc. Only reason not now is that I need full panniers on my townie for food shopping. Between the trunk bag, small seat bag, front handlebar bag, and small bag between aero bars, that was plenty for a roadie. Theres also storage inside the beam rack for long stuff like spare spokes.



If you want quick on and off, get a Topeak trunk bag and beam rack with matching dovetail engagement and latch.