Sold Shimano XTR M900 Rear Derailleur M910 RD-M910

The only difference is that the internal spring mechanic changed.

Other than that they are exactly the same, apart from one is stamped M910 and one M900.

M900 was running up to 1994 and M910 was for 1995 only and then superseded by M950
Many thank! I have a mint m910 rear mech and want to use it on period correct 93 bike. Do long as it looks right. I could see any other differences but my m900 RD are in average condition.
 
Technically it’s not correct as 93 would be M900.

That said appearance wise there is no difference unless you either look inside the spring assembly or the stamp plate.

To the uneducated they appear exactly the same.
 
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