Rear Mech ... Which one?

alexransome

Dirt Disciple
Hi there, I have found in my shed two rear mechs. Both Shimano Deore XT. One is a RD-M750, the other RD-M739.

The 750 has lost the black paint and has more rust pits than the 739, but mechanically they both seem fine. Although the 750 will need new pulley wheels.

My question is ... Which one to use on my Orange P7 rebuild?
 
Its this one
Sorry for the crap pic
:oops: this is actually an m737,but they look so very much alike that you'll get the picture
 
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