Stiff Cassette

Stevo210

Came to ride the old girl this morning after a few weeks off. An noticed I couldnt backpedal without the chain dropping really slack and the derailuer bending up.

After a bit of investigation turns out the cassette was super stiff and wouldnt turn. So took the wheel out and the cassette turns pretty freely, put it back in tighten the skewer and its stiff again.

What would be the diagnosis for this, bearings of some description??

Its a DT swiss hub as standard on my Cannondale. Think it has needle bearings......I think.

Any help would be much appreciated as Im about to strip it to see what I can see.

Stevo210

Had a closer look. If the locking nuts on each end of the axle are not loose the cassette wont turn. Tighten the nut up with your finger and the cassette stiffens, tighten with a spanner, cassette nearly locked solid

Surely these nuts should be tight?

nicklouse

which DT hub?

sounds like the lock nuts need locking together.

Stevo210

DT 370 The non drive side nut is tight, the drive side at the moment is loose, once tightened the cassette and axle move as one.

nicklouse

http://www.dtswiss.com/getdoc/759e2d77- ... sheet.aspx

see how to strip it.

sounds like you have some crap behind part no 13 or something is missing or something is pressing on the body.

Stevo210

Thanks for that Nicklouse that'll be a big help. I'll get stripping and see what I can find.

Stevo210

Had it in bits, the outer bearing just under the locking nut and spacer cover has seized. Looks like a simple case of replacing the bearing.
As the nut was tightened it was clamping up on the seized bearing thus stopping the cassette from moving.
Thanks for your help.