High standards? 137mm bcd ...

[grantoury]

I have read a lot of comments lately on the development of so many new standards in cycling. And when I was contemplating building a Surly Midnight Special recently, I was put off by the amount of standards that demand other standards that demand other standards. I gave up, although the itch hasn't gone yet.

But, working on my 1978 Gazelle Semi Race, I found the SR crankset takes 137 bcd chainrings. Mmmmm, I haven't found anything suitable yet. Are we just begrudging the new and forgetting the past was not that different?

 

[Guinessisgoodforyou]

I have read a lot of comments lately on the development of so many new standards in cycling. And when I was contemplating building a Surly Midnight Special recently, I was put off by the amount of standards that demand other standards that demand other standards. I gave up, although the itch hasn't gone yet.

But, working on my 1978 Gazelle Semi Race, I found the SR crankset takes 137 bcd chainrings. Mmmmm, I haven't found anything suitable yet. Are we just begrudging the new and forgetting the past was not that different?

View attachment 919939

What ring do you want?

 

[grantoury]

What ring do you want?

I haven't actually decided. It has a 50 now and I think a 45?

 

[Guinessisgoodforyou]

Haven't got a 45 think I have a 42 or 40

 

[grantoury]

Haven't got a 45 think I have a 42 or 40

If you have no use for it, I would like to buy it from you.

 

[non-fixie]

The later versions of that bike came with the "RG" version of the Apex-5, with a 118 BCD. Which is almost as rare as 137 (you sure it's not 144, BTW?).

These allow for a more useful gear range. The 36T rings are pretty much unobtanium, but 40T rings can be found.

I believe I have a spare set with the original 52/42 rings if you're interested.

 

[grantoury]

The later versions of that bike came with the "RG" version of the Apex-5, with a 118 BCD. Which is almost as rare as 137 (you sure it's not 144, BTW?).

These allow for a more useful gear range. The 36T rings are pretty much unobtanium, but 40T rings can be found.

I believe I have a spare set with the original 52/42 rings if you're interested.

I am interested.

That Apex crank does give good range, but has the same problem of no chainrings being available, of course. It is definitely not 144.

 

[Guinessisgoodforyou]

Sorry mate, all my SR stuff is 118mm

 

[grantoury]

Sorry mate, all my SR stuff is 118mm

Thanks for looking.