This has been discussed before but it is still not clear to me. I am looking for a c-record bottom bracket, italian threading which would be 111 mm to use with the c-record cranks. I have seen several available recently with slightly different markings.

70-SP and 70-SPc.

I understand that 70 is the Italian width and that S is strada and P is pista. The "c" is supposedly for corsa or c-record. So what is 70-SP? Is that a later designation? Is it for the early 90s Record crank (not for the c-record cranks)? Or are they exactly the same? Then there is the issue of finding the right cups and bearings.

I have no information about this.
Perhaps the explanation is that when Chorus (B), Athena (G) and Cd'A (A) sets come out, they also have an axle length of 111 mm, with a distinctive mark. And then they put "c" on the Record axis, which was previously not marked with extra "c" as the only 111 mm axis. But that's just my assumption ...

According to this logic, SP was the former and SPc is later. I have a first generation C-record crank (11) with the original 14 ball BB. Tomorrow I'll check Sp or SPc and I'll write it down.

I'm copying a contemporary brochure here, unfortunately not C-record, but there are almost everything in the older axes. Maybe someone can use it.

"70-SP" is pre-1990 C-Record; "70-SP C" is post-1990 C-Record. Note that they use different ball sizes and are thus not interchangeable and need the proper corresponding cups.


Source: Sutherland's 6th Edition

There are some interesting data in this table.

1. Isn't 11-7/32 at SPc?
2. 109 mm axis lenght with 1 or 2 chain rings?
3. 70-SS with 109 mm and 14-3/16?
4. I've seen 68-SP without "c", this is not listed in the table

I'm not an expert, I just ask.

No, earlier Record bottom brackets used 11 1/4" balls on each side. I don't have a post-1990 Campagnolo bottom bracket to check, but I do have a Zeus 2000 titanium bottom bracket that uses 14 7/32" balls on each side, so I don't find that implausible.

I haven't tried C-Record with a single ring. But the 109mm SP and SS spindles are noted to be the same.

I do have a C-Record 68-SS bottom bracket that measure 109mm and uses 14 3/16" balls.

That was on the previous page:


Source: Sutherland's 6th Edition

John and Fireleg,

Thank you for those charts. They will be quite helpful as many of the spindles are offered without the cups. Obtaining the correct cups and balls could be very frustrating by going by a sellers description alone.

Interesting. I just found a 70-SPc for sale with cups and balls in cages. There are 11 balls in each cage. Maybe mismatched by the owner?

John- Does your Sutherlands mention any specifics on the thick cups? Are they all the same regardless of ball size? Do you only need to match the right spindle with the right cup(thick vs thin)?

According to the table, the axles for 3/16" and 7/32" balls are otherwise dimensionally identical. Perhaps the extra 1/16" of width of the later BBs is taken up in the cups?

Anyway, it seems plausible to me then that the SPc designation is to differentiate the later axles from the earlier SP for 3/16" balls. I think that's also the point they stopped calling the group C-Record or Record Corsa, but had reverted to simply Record.

No, there's a lot on spindles, but nothing on whether the cup thickness differs in the various C-Record bottom brackets.

In general, the races are ground to match a specific ball size, so my intuition is "no, you need to match the spindle with the cups." Sutherland's does offer this advice:


Source: Sutherland's 6th Edition