What is the BCD on Sram XO 2x10

[ericepark]

I want to get 32T single chainring on my XO 2x10 crankset. 26/38T

Can someone please tell me the BCD ?

[FujNoob]

104/64

[ericepark]

Thanks FujiNoob.

Just curious, why does the chainring say 120 BCD on the larger ring, if it's actually 104?

[ScaryJerry]

because it's actually 120/80mm BCD...

[-Todd-]

Thanks FujiNoob.

Just curious, why does the chainring say 120 BCD on the larger ring, if it's actually 104?

Yeah, the X0 and the X9 2X10 are the 120/80mm BCD. There is another spider assy that sram sells to get the smaller rings to fit, or you can look at other options. NorthShore makes something useful.

What's your plan?

[RoweVelo]

FWIW- My BB30 XO 2x (22/36) crank spider is 64/104 and its the original one that came with my crankset.

[-Todd-]

Of course it is. No such thing as a 22 tooth 80mm BCD

[RoweVelo]

Yeah, the X0 and the X9 2X10 are the 120/80mm BCD. There is another spider assy that sram sells to get the smaller rings to fit, or you can look at other options. NorthShore makes something useful.

What's your plan?

I was just trying to clarify that not all 2x SRAM cranks come with the 120/80 BCD spider.

[FujNoob]

You sure on 26/38?

SRAMS site shows the following options-

•X-Glide 2X10 and 3X10 shifting technology, 26-39, 28-42 and 22-33-44 gearing

•New 36-22 and 38-24 chainring options



Possibly a 26/39 or a 24/38? It will make a difference.

[RoweVelo]

You sure on 26/38?

SRAMS site shows the following options-

•X-Glide 2X10 and 3X10 shifting technology, 26-39, 28-42 and 22-33-44 gearing

•New 36-22 and 38-24 chainring options



Possibly a 26/39 or a 24/38? It will make a difference.

Good point. And the plot thickens.........................

[fatcamper]

There are plenty of good options out there to accomplish what you want to do, but I'd highly recommend getting a Mountain Racing Products home of MRP, White Brothers, Kreitler, Tamer, and Power Grips | MRP Bling Ring Chainrings. You'll save a little weight by dropping the spider.

[juan_manuel]

I support fatcamper, but if you want to have a single ring spider you can get this:

Universal Cycles -- Sram X.0 GXP Spider & Chainring

Btw the X9 and X0 cranks support different spider and even chainrings (like the mrp bling ring); Sram makes and sell a 64/104 bcd (22/36 and 24/38) and another 80/120 bcd (26/39 and 28/42) spider-chainring kit.

Then you can mix other brands and size of chainrings on the spider.