XMCS crankset for the S5

xmcs_crankset
155mm XMCS carbon crankset came in the mail.

xmcs_chainring
Not so light 1 by narrow wide 52T chainring (chainring bolts were 6g).

xmcs_crankset_narrowwide
All assembled.

xmcs_crankset_weight
Assembled weight.

s5_weight
Almost UCI Illegal.

I got my XMCS crankset today, with carbon spider and 52T 1 by narrow/wide chainring.

I’m running on Dura-Ace on the S5, so using a waxed Dura-Ace 12-Speed chain, and the Shimano quick link is “sticking” to the chainring causing the chain to stick on some but not all rotations.

I had to bail out of my test ride, but on the stand I can see the quick link is too narrow for the narrow/wide chainring teeth (it doesn’t engage completely thus causing the chain to lift off the chainring).

I did some googling and found that Stone narrow/wide chainrings state: You have to replace the 12s shimano original quick link to other brand 12s quick link like KMC YBN SUMC any brand. as the Shimano 12s quick link is too narrow.

It’s after hours now but I thought I’d raid my parts bin and run a few experiments:
– ZTTO 12-Speed chain quick link, same problem.
– ZTTO 12-Speed chain + ZTTO quick link, same problem.
– SRAM Red E1 chain quick link, no go (stiff links).
– 10-Speed KMC quick link, perfectly smooth (but the link is loose/felt too easy to install).
– 11-Speed KMC quick link, perfecty smooth, and again, felt a little too easy to install.

I’ll try to track down a KMC 12-Speed and/or YBN 12-Speed quick link tomorrow when the shops are open.

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