Rear axle / free ride shudder

[Rydogg]

Hi guys, I don't know a lot about this stuff, but I have a problem.

 

When I'm cruzing above about 20km/h, there is this really load shudder that comes from the rear of my bike. It's not the brakes, coz it doesn't go away whether I brake or not. I think it's the free ride bearing (or whatever you call it), coz it goes away if I peddle a little and comes back when I stop peddling.

 

Is this common or even possible? What can I do?

 

Sorry if this is confusing, but I just can't figure it out.

[DJR]

When yoy free wheel and you take your feet off the pedals, do the cranks stand still or do they keep rotating? Otherwise, if you push the bike, do the cranks stand still or rotate?

 

If the cranks rotate, it is most likely the freehub that is faulty and needs a service or replacement.