There are differing opinions out there on whether riding fixed has any positive training effect for geared bike riding. For a rider at the elite level, with excellent coaching, there may be less benefit, but for the average enthusiast cyclist I think there are clear benefits. This position is based on my own experience over the years, and from others I trained with.
For one, with no coasting there’s no question that the cardio gets more of a work out- it’s as close to running as you’ll get on 2 wheels. This, of course, assumes that the RPMs are at a high enough level to push your heart rate.
Secondly, it forces you to increase your RPM range. On the geared bike will you be able to maintain the same high cadence as on your fixed? Probably not- the fixed design helps you complete the pedaling circle by carrying your feet through the back side of the circle. But, your legs are conditioned to operating across a wider range of RPMs, which is really helpful when responding to an attack, for example. You can get up to speed quickly without necessarily immediately shifting to a higher gear. Think Ferrari instead of Detroit V-8.
Third, for climbing, your legs get used to a mid range gear from the climbing you did on your fixed, which will make you a stronger climber on your geared bike. And the climbing technique is improved since you had to learn to negotiate those hills with that one gear.
Overall, the fixed is particularly well suited to off season use, since it effectively prevents you from pushing the big gears, so your legs are fresh going into the spring season. There is another benefit as well- fixed is a blast and a refreshing mental change from riding gears!


