There are a lot of discussions on indoor trainers.
Wind, Magnetic, or Fluid are the basic. Wind, not much to go wrong but loud. Magnetic, they get warm and you need to keep the clean. Combo, Wind & Magnetic, lots of resistance and they are usually variable. Fluid, pretty quiet and they get hot, some older models have been known to leak oil. I think they are better now.
The expensive ones have electromagnetic resistance and feedback to a computer program.
Rollers have friction and you can add a fan/wind, magnetic, or fluid.
www.nashbar.com/bikes/SubCategory_10053_10
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