Wrenching question - Campy Crankset

[ANAO]

Hey y'all,

I'm trying to fit my Stronglight rings to my Campy SR11 cranks but the back bolt isn't sitting flush in the little ring.

Any thoughts on which bolts I might use to make the rings work? The little ring doesn't even really have a cutout like the big ring does.

Sorry for the poor pics and TIA guys.

https://scontent-lga.xx.fbcdn.net/hphotos-xpt1/v/t34.0-12/11160391_870327926373062_1357476293_n.jpg?oh=9b1bd b0987415cde62d4f0fe62942212&oe=553FBC4A

In this picture, you can see how the bolt on the right (hidden behind the crankarm) sits flush, while the other one (closest to me) does not. The bolt from the front doesn't even reach to the bolt in the rear as it's not flush.
https://scontent-lga.xx.fbcdn.net/hphotos-xpf1/v/t34.0-12/11186283_870327949706393_1335867934_n.jpg?oh=00596 f67dcf4b0ba913f81bfb64178dd&oe=553EF106

[thirdgenbird]

Are the holes on the small ring threaded? You may not need the back part with the correct front bolts. (Later 11spd campy)

Care to show us the front side? I like what I see.

[ANAO]

Are the holes on the small ring threaded? You may not need the back part with the correct front bolts. (Later 11spd campy)

Care to show us the front side? I like what I see.

Sure - here's the front: https://scontent-lga.xx.fbcdn.net/hphotos-xpa1/v/t34.0-12/11178391_870342569704931_1572092079_n.jpg?oh=0bdf8 29c3f78b27784a74314bb9fdda3&oe=553EE0DE

And the little ring does seem to be threaded...however the diameter of the bolt is less than the threads, and it just slides in.

https://scontent-lga.xx.fbcdn.net/hphotos-xft1/v/t34.0-12/11125224_870342619704926_910398711_n.jpg?oh=94e8e4 f196374ee0fa21c07ef064f7f3&oe=553FCD5A

[thirdgenbird]

It looks like they were designed to be used with the later 11spd bolts. The later 11spd rings are threaded in the same manor. I can't remember what year the change happened.

I'm really digging those rings. I had not seen them in 135. Where did you pick them up? If I go 11, I may keep my record 10 cranks and brake calipers.

[Cicli]

The four bolts come from the outside in. If they just slide in, you have the incorrect bolts.

[ANAO]

The four bolts come from the outside in. If they just slide in, you have the incorrect bolts.

Thanks, to both of you - very helpful. Where might I find the new bolts?

[thirdgenbird]

I think these are the guys
http://www.modernbike.com/campagnolo-11s-chainring-bolts-2011

Oldpotato can verify. I'm deeply rooted in 10spd and haven't left.

[ANAO]

It looks like they were designed to be used with the later 11spd bolts. The later 11spd rings are threaded in the same manor. I can't remember what year the change happened.

I'm really digging those rings. I had not seen them in 135. Where did you pick them up? If I go 11, I may keep my record 10 cranks and brake calipers.

Here's the outer: http://www.xxcycle.com/stronglight-chainring-time-trial-135-ct2-type-d,,en.php

And here's the inner I matched it up with: http://www.xxcycle.com/stronglight-chainring-135-ct2-inner-11-speed-campagnolo,,en.php

[oldpotatoe]

I think these are the guys
http://www.modernbike.com/campagnolo-11s-chainring-bolts-2011

Oldpotato can verify. I'm deeply rooted in 10spd and haven't left.

That's correct..for a threaded small ring ala Campagnolo. And you are doing these rings because of the $ of Campagnolo ones?

Ya get what you pay for, IMHO..Campagnolo ones, altho expensive, work the best, last the longest, IMHO.

[ANAO]

That's correct..for a threaded small ring ala Campagnolo. And you are doing these rings because of the $ of Campagnolo ones?

Ya get what you pay for, IMHO..Campagnolo ones, altho expensive, work the best, last the longest, IMHO.

I wanted to try something new. No good reason.

Thanks, just ordered the bolts.

[ultraman6970]

People from what i heard had been using half of the new bolts and half of the old ones in cases like this.

[Mark McM]

I wanted to try something new. No good reason.

Thanks, just ordered the bolts.

Just like Campagnolo has made several different versions of their chainrings, Stronglight also makes several different versions of Campagnolo compatible chainrings.

It appears that you have the Type D chainrings, in which the chainring bolts thread directly into the chainrings. The Stronglight Type C chainrings are the ones that work with your current chainring bolts.

And don't blame Stronglight for this mish-mash - they are just following the mish-mash that Campagnolo created by making multiple different non-interchangeable chainrings.

[ANAO]

I guess the question we should really be asking is, "why is there no standard in the bike industry?"

[Cicli]

:banana:I guess the question we should really be asking is, "why is there no standard in the bike industry?"

We can start with bottom brackets.:banana:

[oldpotatoe]

Just like Campagnolo has made several different versions of their chainrings, Stronglight also makes several different versions of Campagnolo compatible chainrings.

It appears that you have the Type D chainrings, in which the chainring bolts thread directly into the chainrings. The Stronglight Type C chainrings are the ones that work with your current chainring bolts.

And don't blame Stronglight for this mish-mash - they are just following the mish-mash that Campagnolo created by making multiple different non-interchangeable chainrings.

Gee, kinda like shimano did with 7900..and with chainring bolts, they are interchangable..just the small ring changed. Try putting a 7900 big ring onto a 7800 crank...

[thirdgenbird]

And don't blame Stronglight for this mish-mash - they are just following the mish-mash that Campagnolo created by making multiple different non-interchangeable chainrings.

They appear to be interchangeable. He just needs different bolts.

[Mark McM]

They appear to be interchangeable. He just needs different bolts.

Yes, in this case they are interchangeable with the cranks, but not interchangeable with the bolts; which as you allude, is better than the other way around. :)

But Campagnolo also makes chainrings with the same BCD, and that work with the same bolts, but are not interchangeable between cranks. I'm specifically talking about Mirage/Veloce/Centaur chainrings, which are not interchangeable with Athena/Chorus/Record chainrings. Even though they look nearly the same, and use nearly the same geometries and dimensions, due to a difference in thickness (2.7 mm vs. 3.5 mm) they can not be interchanged.

[thirdgenbird]

Yes, but at least chorus+ has been remarkabley consistent. You can put 11spd rings on an 8spd crank if your heart desires. you can even get them in the correct color. Centaur and below is hit or miss.

The problem isn't Campagnolo specific. 7800, 7900 and 9000 all use different rings and hardware. The ultegra variants from the same years are also finished so differently that swapping looks odd. While it can be done, it rarely is. Campy has had far fewer chainring part numbers chorus up vs shiamno 105 and up.

SRAM probably had the most universal rings but even they have mixed it up by hiding a bolt behind the arm.