Originally Posted by
Chris W.
The website said the five pin cranks had a 50.0 bcd (as opposed to 50.4), I wonder if that was a typo or if that is what it really is?
I suspect it's just a lack of precision in stating the specification. I bought a couple 5-pin Electra "Tincino" chainrings last month on sale for $10/ea. They're made by FSA and marked as "50mm BCD" but they fit my TA Pro-5 crank arms just fine. I wouldn't be surprised if these "SunTour" 5-pin crank arms come from the same foundry that supplies Electra's 5-pin crank arms.