They worked quite well during my rides on the Pelaton Spin bike. We ride about 3-4 times a week. My problem is that they unscrew and turn on after about 3-4 rides. I tighten them with a battery powered impact drill, but after 2-3 pulls the screws start to loosen. We've had them for about 5 weeks now and I suspect we'll need new screws in the next month or two. Once the screws are loosened, you will hear a metallic thump with every spin of the spin bike. It can be annoying until you start panting again after a ride. This has only happened to me on 3/14 trips, but still. :) In any case, they still work.
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