Thread: Calculated BCD for TA chainrings/ is this right?
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Old 04-03-21 | 02:10 PM
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Originally Posted by Nubra
How did my calucations go so wrong? I added a screen shot of the directions I followed to determine the BCD. Are these NOT TA rings?
I added some more info from Sutherland's 6th. 40 mm hole center to hole center is a 80 bcd and that's consistent with your measurements. Also it's a 6 bolt pattern.
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