YES!<br><br>
I used to be a spinner and spinner only. I didn't realize it at the time, but I was a spinner for the sole purpose that I had weak biking legs. My overall speed had a top end. Until I got on the Trainer and built up muscle doing low cadence work. Although I'm still a work in progress, I can now push a big gear for a long time, and not only that but I recover quickly such that I can push a big gear, burn my legs out, gear down for a minute, then go right back up. And my overall speed has skyrocketed from where I had been. You absolutely need that leg strength to go faster.<br><br>
However, once you have the leg strength, the next step (at least for me in my plan) is to insert back that cadence, but not so that you're spinning easy gear. You want to get to the point where you're spinning a hard gear. When you can do that, then you have achieved close to your utmost potential with basic parameters. Take it up a level again with another strength build phase the next year, and repeat.<br><br>
Would love to hear Jr's take on this, but for me, there is no question that I had to gain leg strength by pushing a big gear for my speed to shoot up noticeably. Last year by end of season, I was able to add in the cadence too, and that's when you truly fly. Strength to hold it off. Recover. Repeat. And your times will improve.<br><br>
And I'm convinced that I would not have come even close to my improvement if I tackled the leg strength issue from a position of spinning and gradually spinning more and a slightly larger gear. I had done that in the past without much results.<br><br>
I guarantee that if you do proper Trainer work in the offseason or even early season, you will be that much better for it. But you have to do it at least a few months and follow a basic build, build, build, rest, repeat plan where you force yourself to push more watts per week out.