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What is the spacing on sram's 12sp chainrings?

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What is the spacing on sram's 12sp chainrings?

Old 06-05-23, 10:09 PM
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What is the spacing on sram's 12sp chainrings?

A bit of searching hasn't turned up much on this, looking for the spacing between a rings on a 12sp sram road double crankset. I'm trying to see if I can make a non-sram double crankset run on my daughter's Rival axs setup. It's been running 1x which worked fine with a 40t ring for Jr. gearing restrictions but those restrictions went away and a 46t went on so she could keep up in the races. But this last week she did the Hincapie Grand Fondo in PA and the 46/34 was not low enough to make several of the climbs. Right now I can't find the 160mm rival crankset in stock unless I get the wide version which is a poor choice for a 12yo girl so I'm trying to make her 155mm crank compatible. I figure this means I'll have to mill the spider some, or the chainrings to get the spacing close enough, just need to figure the spacing I have to reach.
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Old 06-06-23, 11:17 AM
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Email SRAM.. ask them?
and, in my experience... 12 yr. olds grow like crazy... she'll fit the longer crankset perfectly in a few weeks... and then need a longer one in a couple months.... etc.
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Old 06-08-23, 03:02 PM
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Eyeballing with some calipers, it looks like about 8mm, though that could be off by half a mm or so.

If it were me, I would try the 165mm cranks with 46/33. Or for more $$$ you could keep the 1x and get an XPLR RD and 10-44 cassette.
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