Originally Posted by
caloso
Fluid trainers are intended to increase resistance at higher revs, in order to mimic the aerodynamic effect of riding outside.
If it ramps up gradually, and then much more sharply, then it's probably working as intended. If there's an abrupt change, then something may be wrong.
Right- I understand what they do and a bit of how they work (like a torque converter in an automatic transmission, it doesn't resist until the speed/pressure increase) but when it slows, it's drastic and happens after riding at a particular speed for over a minute. It also includes a vibration but as I posted, the bike's wheel and the trainer's hub spin smoothly. I called Blackburn and they no longer make trainer & their knowledge base isn't maintained, so the person on the call didn't know exactly what this problem could be.
Thanks