Ok so after going over the manual for the Flux and the XL .... heres what the manual says ...
FOR THE FLUX :
The bearing on the cup side of the diff is HPI Part # B032 or a 10x16x5mm.
The bearing on the ring gear side is HPI part # B085 or an 8x16x5mm
FOR THE XL:
The ring gear side and the cup side use the same size bearing.
It is HPI part # B032 or 10x16x5mm.
Gregg
FOR THE FLUX :
The bearing on the cup side of the diff is HPI Part # B032 or a 10x16x5mm.
The bearing on the ring gear side is HPI part # B085 or an 8x16x5mm
FOR THE XL:
The ring gear side and the cup side use the same size bearing.
It is HPI part # B032 or 10x16x5mm.
Gregg