I thought all pista rings would be 1/8"
Could it be that these are time trial rings, specially made for single ring applications?
Could it be that installing the pin was a secondary operation, and that Campagnolo changed its font around the time that it started putting pins in? In that case Campagnolo would have added pins to whatever they had in inventory as needed. There would thus be old and new font with and without pins.
Given the bike boom, with its rapidly escalating demand, it is easy timagine changes made on the fly, and some inconsistencies. We often read on this list about bike companies like Raleigh changing parts in an abrupt and unpublicized way.
far from an expert, Marcus Helman Huntington Woods, MI
Mark Agree wrote:
I have a Campagnolo Nuovo Record 144bcd, 54t outer chain ring marked Patent, that has the wider "O" type font (instead of the taller earlier "0"), is 3/32" thick, and has NO chain stop pin. I also have a Super Record 49t outer ring marked the same way, and also with NO pin. Seems the markings set these in the mid 1970s, and I'm pretty sure I've seen some earlier, tall "0" versions that already had the pin, so does this mean they are 3/32" Pista rings, or could they still be road rings from that late, still with no pin? Please correct me if I'm mistaken on any of the above givens. What are these rings intended
for? Thanks...