It's a new 35-622 Schwalbe Winter spike tire. After some 80km i noticed the rear wheel becoming bumpy. Inspection showed that the tire isn't seated any more approx 180° from the valve. Looked slightly s-shaped when looked from behind and a spike was missing at that spot. Othervise the tire looked fine on the outside. Last time i had this s-shape happening was on a tire that was cut from the outside.


After removing the tire i saw this on the inside. Production error?