Hello (: ..

I'm looking for an inner chainring, 40-45t. campagnolo pista, and if it's possible pista bolts ( not for track! ) ...

I hope someone out there can help me (:??

Konrad

do you mean strada? pista = track.

inner Pista ring? Pista cranks usually only have one ring. what kind of crankset?

you mean strada? If you are looking for nuovo or super record 41T is the smallest (that's 144bcd). Additionally, the 41T ones are quite valuable and can fetch $50 easily. 42t is the most common strada inner ring, but 43-45 are certainly around (43 probably being least common of those).

TA makes a 41t chainring for the 144bcd. Pretty much the only difference between a Pista and a Strada is that the Pista doesn't take an inner chainring.

Actually, an inner chainring could be installed on a Pista if you really wanted to do it. Although it does lack the shoulder on the spider on the inside, this is only a convenience when installing the chainring and is unnecessary once the chainring bolts are installed. Also, the Pista has a counterbore on the inside of the spider to allow a flush installation of the chainring nuts.

On another note, Pista cranks made before the mid 1970s used a larger 151mm BCD and are completely incompatible with Strada cranks. These are the cranks that came with my 1976 Paramount P14 track bike.

I installed a TA 41T 144 bcd chainring on the inside of a Sugino Mighty Comp crank, which is pretty much a clone of the Campy Nuovo Record, and found it necessary to remove several millimeters of material from the tops of the spider to clear the chain inner link plates. Once removed, there was only a millimeter or so of material left at the bolt holes.

but the OP still has not chimed in with what type of crankset he has

You can also make a fake pista out of a strada by going some grinding and countersinking.

Troll?

Troll?

I don't think so, but probably all "webbed up" about terms. Too much surfing.

Pista is Italian for Track, so interchangeable as a term, just the language is different.

Campagnolo has had 2 spec's over the years, a 151 mm bolt circle, for both Road, (Strada) and Pista, track. All Campagnolo arms of the period are stamped as such.

Around 1967-68 Campagnolo went to a 144 mm BCD for the road cranks, allowing for a 42 tooth minimum initially rather than 44 t. Later a small run of 41t rings was made. For a good long time, inner and outer rings were interchangeable, as a junior racer, 44/42 or 47/42 was common due to gear limits. Around 1974 a chain pin was added to the larger rings, 50 and above, to catch the chain in case of an overshift.

Now on to the Pista, with a 151 BCD (bolt center diameter) a 44 was the smallest, and 45 was the typical smallest, as they had reinforcement material on the frame side of the ring, and were for either for "inch" pitch" (skip tooth) or 1/8" wide chains. Older Strada rings can be fitted, again, smallest 44 t.

The timing gets fuzzy, but Campagnolo did adopt the 144 BCD for the Pista rings later, about 1974-75, as stocks were flush, and inventory slow to use up, both 144 and 151 were available concurrently. the mention of a 1976 Paramount coming with 151 crank arms is known, Schwinn had lots. Most distrubutors kept the 151 going too, less to stock. In 1975, I bought new 151 cranks as the rings were more available, unless one was a pursuiter, and wanted new rings and a "hot set up" road width chain, 141 was not needed.

No 40 tooth rings possible.

Now, Campagnolo Pista chainring bolts had the back side nut with a toothed perimeter, to dig into the alloy arm, making chainring changes very quick and easy as the nut stayed in place. They had a patent, so others, like Sugino, could not do it, but guys after frustration, bought Campag bolts to make life easier.

Yes, indeed, the 151 BCD Pista cranks on my 1976 Paramount P14 have those knurled nuts that stay put in the crankarm spider, making gear changes much easier. Three years ago I bought a Bianchi Pista Concept track bike with Sugino 75 cranks that use the loose nuts that fall out and have to be held with the special tool while loosening or tightening to keep them from rotating. Very annoying when you are under the gun to change gearing between races. I found some Sugino knurled nuts that were cheaper than the Campy ones, so apparently the patent issue has since been resolved >>>>>> https://www.worldclasscycles.com/sugi...ring_bolts.htm Shimano Dura Ace chainring nuts are also knurled.

Similar to Capagnolo strada-based BMX arms.

-Kurt

Yes I'm sorry I meant Strada .. but thanks for all the replies (:

I actually looking for a Strada chainset ( silver / chrome ) with two rings ( road )