Does this part go with this?

I know I’m probably going to be flamed for this, but I read about some problems about getting replacement parts for Torker unicycles, I just wanted to be sure…

Would this bearing:

Fit on a Unistar CX?

I don’t have first hand experience with the CX, but from the specs on the Torker site “Main Bearing 40 x 17 x12,” and the link you pointed to on UDC has the same spec, so I’d say it’s a match.

yup, pretty sure that the CX uses the standard unicycle bearings, those should work.