Originally Posted by
kayakindude
We too are dealing with a squeek/rub. Only happens when pedaling and stops when the stoker stands. I've greased the pedals and stoker seat post, but it still happens. The weird part is it only begins after 10-12 miles, so it is really hard to diagnose because there is nothing until we have been moving for at least 45 minutes. It is a thudbuster seat, anyone come across a similar issue?
Since it stops when the stoker stands, the first thing on the list should be the stoker’s seatpost. But since you’ve checked that off, #2 would be the Thudbuster bushings or saddle rails. It’s not too difficult to disassemble, clean and lube the potential sources of noise in the Thudbuster/saddle. #3 would be to check rear brake rubbing due to frame flex. However, we did once experience a similar situation where I did #1,2 and 3 to no avail, and the source turned out to be the rear dropouts. Cleaning all the interfaces between the dropouts, axle and QR, and perhaps applying a light film of lube, eliminated the noise that time.