 I own a c 400 and over the last 18 months , I have had to replace 8 tires, 2 rims, and the front axles.  Thank god for the tire warranty.  I think they’re made of jello.  It’s complete ridiculous.  I’ve tried to get them to give me. A different brand but they won’t.  I’m really inconvenient to have to go to the service constantly, but at least I’ve always got brand new tires.  Wtf?  I assume it’s because it so heavy???