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Any good link for dummies to understand the phenomena?
If I'd been able to find a good diagram of how to clock 1:1 chain drives, I'd have included it :-)
Basically, you want the relation of the teeth to the NDS crank to be the same on both sets, so you rotate one of the rings 72° at a time until that's the case. Most likely whoever cut the rings made one tooth exactly in line with one of the bolt holes, but they could have made one roller in line with one of the bolt holes so there will be a tooth exactly half way between two bolt holes for an ring with an odd number of teeth. It doesn't really matter either way, the easiest way to clock them is to take both rings off and lay them over one another until both the teeth and the bolt holes line up, then make a Sharpie® mark by one of the bolt holes and use that hole on the spider arm opposite the crank on both sets.
I didn't actually give this any thought when I bought my cranks, I just picked the biggest chainring available, but now I'm glad I have 5n teeth on the sync rings so I don't have to think about what orientation to put them on the spiders :-)
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gbj_tester
No idea what this is about. Briefly tried to google the subject, read a bit of Sheldon Brown on the matter of Sync Chains... and watched the first minute of a youtube video on chordal action... too much math for me I'm afraid!
Things were to a large extend built with part bin and forum classified, I put together what I found. Rings are both 53, on 5 bolts spiders, 135bcd front and 130bcd back. Chain is a track chain as front chainset came with track chainring. Rear is a normal road ring.
Any good link for dummies to understand the phenomena?