Ksyrium SL - knocking sound

[EdoardoBianchi]

I desparately need help: My rear Ksyrium SL (silver model) makes a knocking sound when pedalling. The sound is syncronised with pedal revolutions and sometimes goes away when freewheeling momentarily. It is definitely not:

1) A loose cassette

2) BB

3) Crank

(items checked/replaced recently with no effect)

 

Anyone with a similar issue and/or any other ideas (apart from getting new set of wheels)?

 

Tx

EB

[EdoardoBianchi]

Right, so a new set of wheels it is then! All the ammo I needed to convince Ms. EB!

[Man with no name]

Knocking sound? Mines makes a screeeeching sound going downhills! Now relegated to an IDT wheel

[Mark]

you only need to convince yourself thats what you need and the problem will go away.Sometimes the valve knocks the rim which will cause a knocking sound.