Ok Listen up
.... If your lucky you will save about 50g off the total crankset weight with a bit of creative tuning.
Here is the stock weights of my dues cranks.
** this astrics indicates places that you can save weight- and quiet substantual weight too if you go through with all of it you end up with cranks not far of XTR weight and about half the price.
Things to do...
550g - These cant really be touched unless you are crazy.
You can remove as many spacers as posable to gain correct chainline... However if your frame doesnt leak water into the BB through the seattube, or the actuall BB cups then you can remove the plactic spacer tube, as it isnt needed. Removel of this will save 8g which takes the new bottem bracket to 106g
Can easily be replaced with a lighter after market type set of rings. I haven't done it yet- but I am changing my rings to Extralight which I will get of Geo (Dirt Boy) at light-bikes.com sometime soon.. The Large ring is were you save the most weight- replacing the rings with the extralight octaramp rings changes the weights to 64g for the Large Ring, and 30g for the middle ring this is a significant saving over the stockies- you could sub in a lighter grannie ring if you wanted.
The outer bolts are alloy, but the granny ring bolts are steel, replace them and you will save between 6g and 8g I've been running mine alloy for ages with no troubles, and I'm a 185lbs power machine so you shouldn't snap them in a hurry. I use FSA T30 Alloy bolts.
So Now are new weights are as follows.
106g -- She removed
22g -- Stock
30g -- Extralight Octaramp 32T
63g -- Extralight Octaramp 42T
Total Weight = 783g
I hope that helps, I find them to be one of the better cranks on the market- they are stiff, and the BB has given me no trouble what so ever. Stock rings are still kicking, although I will replace them with Extralights sometime soon. A great value crank- especially since you can get them near XTR weight- with out the huge price tag.