Ok, so i just bought a used performance fluid + trainer (the one with adjustable resisance) used from craiglist. When I set it up to ride it makes a weird sound like the one where your roll your tongue and hum (i really cant think of a way to write this noise, just try it any you will understand), Kinda like a car with piston knock.
Is this a normal noise? has anyone else heard this?
This is my first trainer so I dont have a basis for comparison, so before I go and take it all apart, please tell me it is normal and all is right with the world.
it rides fine and i like it, it just seems to be a bit loud?
ps the noise seems to get more pronounced when the trainer is pressed against the tire more.