Originally Posted by
djs42
I have an 80's vintage Guerciotti with Super Record derailleurs and bottom bracket and Ofmega 52/52 170 chain ring and crank.
I would like to add a small chain ring to give me granny gears when required ( .. I know there are some grannies out there who could kick my butt, so apologies for the reference).
I've heard of "triplizer" .. would this work?
Does anyone know if an older triple crankset would also work, and where I might find one?
Your Ofmega crank likely has a 144mm bolt circle diameter and triplizer rings are available from e.g. Red Clover Components:
About Triplizers - Red Clover Components
Avocet cranks were made by Ofmega were available with drilling to mount a standard 74mm BCD inner ring:
They turn up on e.g. eBay fairly often, and usually aren't too pricey.
Regardless of which option you use to mount a third ring, you will need a longer bottom bracket axle to allow the inner ring to clear the frame, and a longer cage on the rear derailleur to wrap the additional chain needed to use the triple ring setup. If you want to keep your Super Record rear derailleur, Soma Fabrications offers a long cage that can directly replace the current cage:
https://www.somafabshop.com/shop/pro...0?category=961
Or, you can replace the entire derailleur with a long-cage unit, and probably enjoy better shifting performance than the modified Super Record.