I crafted several Iron Wheels and when I equip one, they start at 58% durability instead of 100%. This is not a visual bug.
My wolf traveled back to the smelter, but the durability did not decay. Then, when I sent the wolf back out again, the durability immediately jumped down to 16.7%.
Again, the wheel did not decay during the journey. When I sent my wolf back to the smelter, it jumped down to 0.1%. Didn't decay on the journal but broke immediately upon arrival.
I equipped a new Iron Wheel, it was at 100%. I sent them out to the Fluorescent Fountain and immediately the wheel jumped down to 58% again and did not decay on the journey...