Sort of.<p>When I was towing an empty 20+ lb trailer, and the bike +rider was in the 210lb range (so, 10% of the mass) I was about 10% slower than sans-trailer.  Towing a trailer + 25lb kid was about another 10%.<p>A lighter bike _may_ feel different, but whether it&#x27;s weight or something else, or even placebo is up for discussion.  It&#x27;s hard to tell frame weights. 20 years ago, I ran some blind testing where we put weighted waterbottles in a frame, one with lead, one with glass beads, and one empty. 5 trials, A&#x2F;B, which one was heavier. IIRC, adding 5 lbs of lead was noticable to almost everyone, but the difference between 2.5 and 5 lbs was only noticeable to the frame builder.