When I wanted higher top speed, I tried higher gears, and a lighter bike. NO HELP! It took a while, but I came to the same conclusion as these posters--work on the motor. Maintaining a higher cadence takes some work. Your aerobic efficiency will build up slowly, as you practice it. A few times a month, go out with the express purpose of "spinning". Ride at a cadence as high as you can maintain, without bouncing on the saddle. Do a few 'intervals' of this with rest of a couple minutes between 'spins', and sooner than you might think, you will be able to maintain a higher cadence for extended periods. Now if you want to go 'harder', the real fun begins! Now we are talking low rpm 'grunt' work. You can decide for yourself if these will work for YOU.