NOS Gipiemme Crono Sprint / Special Triple Inner Chainring: ~84mm BCD - 28t
These odd chainrings measure about 84mm BCD. I believe they will fit Gipiemme CronoSpecial and CronoSprint triple cranksets as a granny ring (although Velobase reports these cranks use a 94mm inner, which wouldn't allow for a chainring smaller than ). They also MIGHT fit first generation Shimano Deore FC-MT60 touring/mtb crank which is reportedly an 84mm or 85mm BCD.
These rings have a center to center of adjacent bolts measurement of very close to 69mm. Use a caliper to measure the center of one bolt to the next one on your crank and judge whether these will work for you. If anyone has solid info on these rings and this odd undocumented BCD please reach out!
We have these in 28t, 30t, 32t, 34t, and 36t. Some have cutouts, some are standard competition style, one is a thick almost pista style (but still 3/32"). Click Here to see all sizes
New old stock, never installed. A few have VERY minor shop wear.
- BCD: Roughly 84mm 5-bolt. *see description at top*
- 28 tooth