Chainring compatability

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Paul Smith SRCC
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Joined: 13 Feb 2007, 10:59am
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Re: Chainring compatability

Postby Paul Smith SRCC » 13 Nov 2017, 7:22pm

The issue for me personally has always been to make sure the correct chain ring was always referenced so we knew what to order. I don't mind what anything is called as long from the information given we can then work out what needs to be obtained.

TA no longer reference BCD on their website as the distance between nearest two bolt centres, something they did back in 2007. TA and Shimano now list their chain rings as 'PCD', where as Campagnolo list the same dimensions on their website as 'BCD', note many retailers list Campagnolo as PCD!

Fortunately the majority of us have access to information online, so the necessity for asking someone to measure the distance the between nearest two bolt centres is less of a necessity; we can normally work it out!

tascreenshot.jpg
Screen shot from TA website, PCD: specialites-ta.com/plateaux/road/zephyr-chainring.html
Image Attachments
Camoagnolobcd.jpg
Screen shot from from Campagnolo website, BCD: www.campagnolo.com/WW/en/Components/chorus_crankset
Shimanopcd.jpg
Screen shot from from Shimano website, PCD: productinfo.shimano.com/#/spec/2.8/ROAD/Crankset
TA110.jpg
Picture taken from TA chainring packaging