Campagnolo chainring bolt fell off JRA and questions

[rogerspam]

So... have been having too many JRA issues lately.

First, cruising along and started feeling a rhythmic bump sensation. I look down and "sigh" a bulge in the Vittoria tire sidewall. Good thing I wasn't bombing downhill.

Second, going up a steep hill a week later and the chain kept coming off the small chainring even though I was not shifting and already on the largest cog in the back. I thought it was something with the FR setup and fiddled with that later. Seemed OK on a short test ride around the bloc but then on a real ride, the chainring just came loose!

Questions:
1) Do people check their chainrings on a regular basis? I have to note I have never checked my chainring bolts for the past 13 years on my FSA crankset on my previous bike.

2) I have Campy Chorus 12 speed mechanical setup. It is very confusing what is the right replacement bolt set. Anyone know for sure what to get? I tried to run by one store this weekend and they didn't have anything for it in stock and there are various options online. The 1st one should be it yes?

FC-CH1200
https://www.ebay.com/itm/37452855330...8AAOSwUb1nB2JJ

https://www.condorcycles.com/en-us/p...42220462735510

https://wickwerks.com/products/campa...ring-bolt-set//

[Peter P.]

I can't answer Question #2, but in regard to Question #1, I never check my chainring bolts but I have experienced them coming loose, maybe once. It could have been a maintenance fault on my part or I just never checked them on initial installation.

The cure would be a mere drop of Loctite 242 on the male and female threads.

[marciero]

Originally Posted by Peter P.

I never check my chainring bolts but I have experienced them coming loose, maybe once.

The cure would be a mere drop of Loctite 242 on the male and female threads.

Same.

[oldpotatoe]

2) I have Campy Chorus 12 speed mechanical setup. It is very confusing what is the right replacement bolt set. Anyone know for sure what to get? I tried to run by one store this weekend and they didn't have anything for it in stock and there are various options online. The 1st one should be it yes?

FC-CH1200
https://www.ebay.com/itm/37452855330...8AAOSwUb1nB2JJ

Yes, those are the ones..and yes, some blue loctite or anti-seize.

[tellyho]

I have had chainring bolts loosen frequently enough that now I install with loctite every time.

[AngryScientist]

Chorus-12 seems to be particularly susceptible to this. A number of us have had CR bolts come loose on that crankset.

Yes, blue loctite on CR bolts always now.

[Plum Hill]

Many years ago I lost two chain ring bolts and others had loosened when I inspected the crank due to bad shifting.
Lesson learned. Don’t answer call for dinner before tightening all bolts when when working on bike.
Second lesson learned. Campy chain ring bolts are expensive.

[ColonelJLloyd]

His shoes FLEW OFF!

[jimcav]

I had this happen, TWICE, before I started putting loctite on them: 1st was a stronglight; 2nd was campy, both after thousands of trouble free miles.

[Nomadmax]

I run Campag Chorus 12 and found some loose chainring bolts while cleaning. I took them all out and loctited them, then marked the heads and onto the crank/chainrings with a permanent Sharpie. Now all I have to do is glance at the witness marks and make sure they line up.