We bought a new Speedster this spring from Tandemladen in germany. After 300 km it developed an oscillating sound coming from what seems to be the rear hub. The hub is a DT Hügi tandem hub. The LBS says there is nothing wrong with the rear axel, the hub is running perfectly: in PBP we runned past all except fast recumbents on the downhills.
What can be the reason for the oscillating sound - is it something that doesn´t matter?
Carsten & Dorte, Denmarkl