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I am absolutely not a carbon expert but I think anywhere you have two dissimilar materials meeting like this you have to take a more relaxed view of cracking.
At work we have replaced quite a few of the alpina track forks on the fire bikes as they’ve cracked at that bit where the ali crown meets the carbon leg. I’m pretty sure a certain member of staff has ‘disposed’ of all the cracked forks and they have led full and fruitful lives on street fixies and those cracks have never gone anywhere and some of those forks must have going on ten years on the street now.
M_V
thanks you three! can i ask about the carbon crack too? i have the same cracks in paint where the dropout moulding meets the bottom of the seat stay, on both stays. it freaked me out tbh, i bought a new frame and Tredz agreed it was a problem (though i missed the warranty)