Thanks, everyone. The TA chain rings will have to do. I like that they are made from 7075 alloy.
I've always thought rings should be steel for longevity. 7075 has the tensile strength of mild steel, so that is encouraging. I am not sure about the hardness because hardness makes machining more difficult but post-machining tempering can be used to harden the alloy of the final product.
Anyone know about these rings?
Last edited by Bad Lag; 08-29-21 at 11:24 AM.