worms
The creeping inevitability of sudden and catastrophic explosion. Or something to do with the anodising.
It's just a sticker
Thought you’d gone for good from here?
sticker or not surely it’s still warranted
Cat aids, the bad kind.
Looks like the anodising. What cleaning products do you use?
What rim ? Poor anodising
Could it be anything to do with your bike carrier in the next picture?
Winter road salt?
Cleaning products are either washing up liquid or whatever Mercedes gave us when the wife bought her car.
The bike carrier has been used once on a dry day for a test drive of about 3 maybe 4 miles.
Road salt, if it gets grubby it gets cleaned.
It’s the anodising crazing - possibly due to stress/ flexing of the rim, or perhaps just a bad job.
Double check that you aren’t exceeding the maximum pressure allowed for the tyre width you have - that could cause the pattern of cracking In the photo.