On a ride, I lost the bolt and semicircular adapter on the seat post. The bolt that secures the saddle. Unfortunately, I can't find a suitable replacement part. Can I ask you more specifically which manufacturer I can get the part from? Ideally, it's from Germany.

I‘ve been riding
D50CU-31 T1100 rims 20/20H UD matt
Black colour in-house hubs 20/20H 54T sprockets TPI ceramic bearings centre lock straight pull for 100*12/142*12 with Shimano HG Driver
5.0mm carbon spokes
since mid/end of June.

Now they're starting to make noises. A quiet creaking noise when I pedal. After checking the crank and bottom bracket twice, and two different chains and cassettes, I've ruled out the Shimano drivetrain. Today I fitted a different rear wheel and I couldn't hear it anymore. I've taken the freehub off the rear wheel and, when cleaning the components, I noticed metal shavings. It was on my cleaning Paper and Fingers. You can also see wear on the pinion gears. I haven't disassembled the freehub any further as I don't have any tools at hand.

I'm surprised to notice this after such a short time. I wrote to XmCarbonspeed Right now. I am excited how they react.

Thanks for the quick reply. I got to work on it over the weekend. I thoroughly cleaned the pinions with brake cleaner and regreased them. After a longer test ride, I can say that the freewheel was definitely the cause of the cracking. I'm wondering how long the cracking will stop. If it only lasts 1500km, as before,I'd have to repeat this cleaning procedure every 2-3 months. Since there was already considerable wear on the pinions, I suspect the wear will continue. I hope you can see in the pictures how small metal parts are missing from the surface of the pinions.