TA chain ring teeth- why so weird looking?
01-07-21, 06:35 PM
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TA chain ring teeth- why so weird looking?
I want to replace the heavy iron Tiagra chain rings on my son's bike with aluminum chain rings. I came across this TA chainring on Ebay:
Why do the teeth look so weird? It's not simple half circles. It's almost like they machined two overlapping radiuses there. Anyone know why this was done?
How are TA chainrings in general? How are they compared to Origin8 or FSA?
Why do the teeth look so weird? It's not simple half circles. It's almost like they machined two overlapping radiuses there. Anyone know why this was done?
How are TA chainrings in general? How are they compared to Origin8 or FSA?
Last edited by icemilkcoffee; 01-07-21 at 08:30 PM.
01-07-21, 08:28 PM
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The two thoughts I have are either the teeth cutting process got "off index" between a rough and final cut pass or that the TA engineers know more then we do. Andy
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AndrewRStewart
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01-07-21, 08:50 PM
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First, Tiagra chainrings are aluminum, not steel, so saving weight isn't going to work. TA chainrings have a good reputation, probably better than Origin8 or FSA
01-07-21, 08:56 PM
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One possibility is that by opening up the valley of the tooth profile the chance of chain suck is lessened??? Andy
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AndrewRStewart
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01-07-21, 10:08 PM
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Or maybe fakes?
01-07-21, 11:08 PM
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01-08-21, 08:46 AM
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Older TA chainrings in my stock lack that double feature. Going back to the original general question, the TA chainrings are manufactured very precisely from the harder 7075 alloy. They have superior pins and ramps relative to other brands, as well as finish. In my book they are top of the line and whether I go with them or not depends only on financial justification for the particular project and immediate availability in the particular size.
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01-08-21, 10:23 AM
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Older TA chainrings in my stock lack that double feature. Going back to the original general question, the TA chainrings are manufactured very precisely from the harder 7075 alloy. They have superior pins and ramps relative to other brands, as well as finish. In my book they are top of the line and whether I go with them or not depends only on financial justification for the particular project and immediate availability in the particular size.
