There's really minimal tuning available for the XTR RD-M972 shadow 9-speed derailleurs without breaking out the dremel and shaving parts down.
Rear derailleur tuning
Is it worthwhile?
Shimano SP41 shift outer
This is my go-to shift cable housing. The SP41/XTR housing weighs 38g a metre, can be bought in bulk ( 10m and larger rolls ), comes pre-lubed with the Shimano special silicon grease and ...
Shimano G04Ti brake pads
At 19g for a set, these brake pads are the lightest metallic pads available from Shimano. They backing plates are made of titanium to save weight. In comparison, the resin G02A and G03A pads ...