Ceramic chainrings

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mountainman531
Posts: 69
Joined: 13 Mar 2008, 10:17pm

Ceramic chainrings

Postby mountainman531 » 22 Dec 2014, 10:28am

I have noticed that Stronglight do some ceramic chainrings, has anyone tried these? Are there any problems with them and are the worth the difference in price? I presume that there is no problem mixing them with, say, Zicral chainrings on a triple chainset and that they fit a standard alloy spider.

Valbrona
Posts: 2400
Joined: 7 Feb 2011, 4:49pm

Re: Ceramic chainrings

Postby Valbrona » 22 Dec 2014, 1:10pm

Can't think why there would be a problem with them. The ceramic is only a coating - a bit like a frying pan - and after having used these I have never noticed any improvement in shifting over the regular Stronglight 7075 Zircal chainrings in black which I also use.
I should coco.

TonyR
Posts: 5390
Joined: 31 Aug 2008, 12:51pm

Re: Ceramic chainrings

Postby TonyR » 22 Dec 2014, 1:52pm

Valbrona wrote:Can't think why there would be a problem with them. The ceramic is only a coating - a bit like a frying pan - and after having used these I have never noticed any improvement in shifting over the regular Stronglight 7075 Zircal chainrings in black which I also use.


I would have thought that like ceramic coated rims, they would be very prone to cracking and pitting of the coating at the contact points but more so.

Brucey
Posts: 42310
Joined: 4 Jan 2012, 6:25pm

Re: Ceramic chainrings

Postby Brucey » 22 Dec 2014, 3:06pm

I've not used these chainrings so I can't comment on these particularly.

However any thin coating will spall off if the contact stresses are high enough to deform the underlying material. I would say that this is exactly what happens with most aluminium chainrings, if not at first then after a little use.

If you use big chainrings and don't push that hard on the pedals (both of which lower the chain tension) then maybe there is a gain to be had. But if you do otherwise, and/or there are any signs of plastic deformation of teeth on your old chainrings, then I'd suggest that a hard ceramic coating won't be guaranteed to do that much good.

cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

mountainman531
Posts: 69
Joined: 13 Mar 2008, 10:17pm

Re: Ceramic chainrings

Postby mountainman531 » 23 Dec 2014, 10:54am

Thanks for the replies guys, I think I will stick with Zicral, sometimes you just have to pedal hard!