Aromig, maybe the new-to-you rear wheel needs maintenance? I'm told that it should be done periodically. Any idea how many miles are on the bike and how recently the previous owner did routine maintenance?
If you're mechanically inclined, you might be able to find a video online that shows how to do it.
- Gray 2010 carbon WSD road bike, Rivet Independence saddle
- Red hardtail 26" aluminum mountain bike, Bontrager Evoke WSD saddle
- Royal blue 2018 aluminum gravel bike, Rivet Pearl saddle
Gone but not forgotten:
- Silver 2003 aluminum road bike
- Two awesome worn out Juliana saddles