SJX426 

Bought a chain set that was advertised with the pin above the mounting hole for a Record crank or any that have only 5 arms with the fifth mount on the crank. What was sent was with the pin between mounts. Seller didn't have any others.
Disappointed but not enough to send it back because there is a Chorus on the peg board with 5 exposed arms. The teeth are in really good shape with the 42 looking unused.

Any way this is about the pin. I noticed that some aftermarket rings for Campagnolo have two holes, one in each location.

Is the pin threaded? If so, do you know the thread specs?

I am not opposed to moving the pin if pushed. My thinking is that the aftermarket rings would be a better cost-effective solution anyway. Stronglight makes some nice ones.

This one might look good on the De Rosa!

juvela

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Verot outers were made with a threaded pin for decades before Campag began fitting them

all of the Campag ones have seen were riveted


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Mackers

Pretty sure TA and Stronglight use a small hex bolt.
If needed I can check my stash tomorrow, I have a bunch of both squirreled away.

repechage

Need to flip that Red ring to know.
Campagnolo made the pin a rivet.

Pin at the arm aligns with the Corsa Record crank - BUT double check the counterbore-
as I recall Campagnolo at that hole was different - test, don't guess

SJX426 

Thanks for the responses. I looked at the back side of the pin and it looked riveted to me but sometimes you get fooled.

I do have a Corsa Record crank with rings. The fasteners are different than the rest, at least the female part which has a serrated edge to bite into what appears to be a standard countersink like the rest of the mounting holes. The male part is the standard fastener. Those two parts are mounted with the male side on the small ring side instead of the large ring. The serrated edge keeps the female side from rotating when applying the torque. I mounted the female part on the ring before placing on the spider due to clearance limitations between the spider and the arm. I suspect the the respondents above already know that!

I am attracted to the C Record crank because of the hidden mount and the general design.
@Mackers - thanks but not at this time. I am not that motivated to go for replacements yet. Need to take stock of the inventory and condition of the rings. Appreciate the offer.

repechage

I will get a bit fussy here/ a countersink hole has a 45 degree flared face, a counterbore is where a face terminates with a larger bore and there is a step- typical of many chainrings.

gearbasher

I've bought chainrings that had the pin in the wrong location (riveted/press fit). I just used a machine screw and nut. I drilled and tapped a hole for the screw I was going to use in the location I needed. I spun the nut all the way to the head of the screw and threaded that into the ring. Also, using loctite on it. You have that extra pin on it, but who's gonna notice?

JohnDThompson 

I've thought of using circuit board stand-offs for those pins. They have a threaded stud that could fit an appropriately tapped hole in a chainring, come in a variety of lengths, and can often be salvaged from derelict electronic equipment.

Spaghetti Legs 

I’ve been thinking about this recently myself. I have a more recent Stronglight crank with threaded pin. Mine succeeded in unscrewing itself and disappearing. I can’t say I was too disappointed in that it didn’t keep the chain from getting wedged down around the arm as was a royal pain to get back out. At any rate the holes on mine take an M4 bolt I use for bottle cages on my C40, 0.5 pitch I think?

Im going to try to fashion a pin that works better than what was there before.

Chombi1 

The pins I always had on my Stronglight rings all had a slot for a flathead screwdriver tip. Not a hex bolt.