Campagnolo Crank Conversion Double to Single
 

Sorry if this question has been asked before.

I plan on buying Campagnolo cranks from a friend they're Campagnolo Record cranks with double chainrings.

My question is, will I be able to convert these to single? I don't mind buying a single chainring and shorter bolts to do so. Also, will the Bottom Bracket have any issues?

Thanks for replying!

I can't see why? Good luck

In general, it should work. Get some BMX chainring bolts to mount a single ring. Often, the best chainline is obtained by mounting the ring on the inner plateau. One caveat: if your "Record" ctranks are actually "C-Record" you may have trouble with the mounting bolt that goes in the back of the crank arm, as it is different from the other bolts, but perhaps a spacer might allow it to work (never tried it, myself).

http://velobase.com/CompImages/Crank...CFDCCEE6B.jpeg

Another Fixie build? You have to get the chainline right. NB <C> uses an ISO taper .

[QUOTE=JohnDThompson;16853206]In general, it should work. Get some BMX chainring bolts to mount a single ring. Often, the best chainline is obtained by mounting the ring on the inner plateau. One caveat: if your "Record" ctranks are actually "C-Record" you may have trouble with the mounting bolt that goes in the back of the crank arm, as it is different from the other bolts, but perhaps a spacer might allow it to work...[QUOTE]

+1/2

A few issues to consider.

1- Campagnolo cranks are 135BCD, so your options will be limited to Campag. rings, or analogs made to fit. I don't know of any 135 BMX rings.

2- if they are Record, you have to use the special bolt that mounts to the arm, but can use track or SS chainring bolts for the other 4 positions.

The special bolt will need a 4mm spacer to replace the missing ring regardless of whether you mount the single ring inside or out of the arms. If you don't have a spacer, and are willing to sacrifice a ring you can cut a bolt hole off either ring.

Or you can do something slick, and cut, grind or file all the teeth off the outer ring, then file a bevel on the inner side so it's like one side of a V-pulley. This way it'll make a nice chainguard, and also a safety to re-rail the chain if it wants to fall off on bumps.

i've got a bunch of road double cranks set up as single. one is a Campy Athena. i use the original big ring with steel singlespeed crank bolts. no problem.

BTW, i've just purchased a new Dura-ace 7900 and have removed the inner ring and will soon have it set up on a new build i am working on.

Hey any issues getting the chain line right for single speed. You used the outer ring on Athena crankset yeah?? Thinking of doing something similar with an old bike.