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Old 03-31-23, 05:10 PM
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tmnguuyen 
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Thun Crank - Looking for advise/info

Hello BFers,

I'm currently working on a Raleigh Richmond. The bike comes with a single chain ring Thun crank set. Please see photos below. The ring has tapped holes for a chain guard ring. There are also untapped holes. I'm curious if these are for the mounting the second ring. If so, anyone has a source for a smaller ring and mounting bolts? The ring has a 3 hole pattern, i measured the distance between 2 adjacent holes = 100mm per Sheldon's cheat sheet the BCD is 116mm. Thanks @juvela to tell me to go do more digging....
I have a set of TA i may throw on there but this crank set is interesting and i believe it is original to the bike.

Thanks


Last edited by tmnguuyen; 03-31-23 at 05:37 PM.
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