Bike Forums - View Single Post - 144 BCD Chain Rings

08-29-21, 06:57 PM

#15

Classtime

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Join Date: Jan 2015

Location: Los Angeles

Posts: 4,707

Bikes: 82 Medici, 2011 Richard Sachs, 2011 Milwaukee Road

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Quote:

Originally Posted by Bad Lag

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?

I have one on my 82 Super Record equipped Medici. IMO, better than original and I never get any sh_t for it. The original SR lasted so long that it could not be replaced reasonably with NOS. Settling for T.A. Rings is a blessing + Dealing with P.W. is C&V😊

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