There is a big difference comparing a solo vs group effort. Cutting through the air is much bigger factor and force at those speeds than the bikes weight. On the hills and slower speeds, the overall weight is a bigger difference. A quick fix on the equipment side maybe some better rolling efficient tires. There are no quick fixes for the "engine" side unless your fit and comfort is not right. You were not running at 25mph, you are already going a lot faster than you were before.
Last edited by u235; 07-17-19 at 09:02 AM.