Campagnolo charinring bolt question

[tanghy]

I have a 2010 ultra torque compact super record crankset, tried to change the chainrings to 52/36, but the standard chainring bolts and the hidden bolt all do not fit (none sit flush with the indents)

Can someone point me in the right direction to what bolts I should use?

Thank you

[oldpotatoe]

Originally Posted by tanghy

I have a 2010 ultra torque compact super record crankset, tried to change the chainrings to 52/36, but the standard chainring bolts and the hidden bolt all do not fit (none sit flush with the indents)

Can someone point me in the right direction to what bolts I should use?

Thank you

Do you have the small ring facing the right direction? Which chain rings are you trying to use? AND the BCD, Bolt Chainring Diameter is 110mm for all the exposed arms and 112mm for the one that goes behind the crank arm..see the rounded portion above the hole at 10 oclock? And the 'name' faces outboard, away from bike.

[Black Dog]

Could the new rings have the threaded smaller ring?

[tanghy]

The hidden bolt ring is smaller, so the old hidden bolt does not fit thru the smaller chain ring

The rest of the holes work fine, I can make tbe inside bolt fit and thread up but on the bigger chain ring, the bolt with faces outside has the edges which are bigger so it does not sit flush into the recessed lip

The bcd and arms all line up fine


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[tanghy]

Originally Posted by Black Dog

Could the new rings have the threaded smaller ring?

crap you are right, i had to wear my glasses to see carefully.

[ultraman6970]

If the holes are different size but the right bcd always you can use a press drill to make the holes bigger. Just use the right drill bits. Easy fix.