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Hi everyone,

I have a XX-CR. Just got new XX rear arms (losa2130) and they're longer than the CR arms. Now the stock xx-cr dogbones are too short...

since new dogbones/axles wouldn't hurt, which one do I buy?

Why would you want to run xx arms on an xx cr? You want part losa2031 or losa9802 (graphite). I believe that the geometry of the XXCR is different than the xx so you cannot interchange parts between the trans and the hubs.