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[MPowerZ32]

[tsk94]

Applies to basically any 3 piece wheel, particularly for hard track use.

Used a few 3-piece wheels on my E36 race car and the same thing happened. They need to monitored and they are a consumable wear item.

[KishMish]

cracks like that are common on tracked wheels. the beauty of 3 piece wheels is you can replace inner barrel outer lip at different times.

[Munich S65]

Seems the tire size (or other factors increasing stress on wheels) they're running impacts these guys more. I've seen Porsche guys post they've run e88s for years of 100+ track days without any damages, but they run meatier tires setups.

These guys are also running those cars as taxis and lap cars = repeated heavy use.

[//steve\\]

Originally Posted by KishMish

cracks like that are common on tracked wheels. the beauty of 3 piece wheels is you can replace inner barrel outer lip at different times.

The downfall being that even a single replacement inner barrel alone is more expensive than an entire wheel for majority of the other common track wheels so it's not even really cost effective.