It's not "gone" yet, just a hairline crack around the tube across the whole rear side. I only noticed it when oiling the chain. I wonder if the baby seat has contributed tbh.
I rode it this morning, paying attention to any noticeable flex or creaking, and didn't detect a difference.
It finally happened. Frame has cracked around the base of the seat tube.
What do do now? Is it weldable? I might just retire it from commuting/dad bike now and set it up for cross until it kills me.
♩ We had joy, we had fun, we stuck track nuts up our bum... ♬