PaulMD said:Training on the rollers is something else as training on a spinningbike. With a spinningbike you have a flywheel that is fixed with your pedals like on a bike with a fixed gear (track bike). Training on the rollers is therefore no option.
If you use rollers (or a trainer) with a fixed gear bike, it will be fixed. Why won't this work? The PowerTap can be converted to fixed. You need to be careful, but it works.
I think the Saris/Cyclops is their spin bike (flywheel) with a PowerTap hub. If so, it is like a spin-bike, but not fixed - the flywheel will 'coast'.
I've messed with the StarTrak (old Schwinn fitness company that now makes the 'original'😉 and they were just cheap, square taper bottom brackets like those on cheaper comfort bikes. I saw no reason why an Ergomo wouldn't work. This is the only solution I know of if you need a flywheel type, fixed gear spinner bike.
BTW, I think most of the new spinner type bikes actually have a clutch built into the fly wheel so that they are not totally fixed. Too many spinner riders popping themselves right over the bars with a truely fixed model.
TF