I'm converting my trek 520 to a single speed and I want to use the existing mountain crankset I have on it. I have a Shimano Deore LX FC M582 triple. I want to remove the two inner rings and only use the 44t big chainring. However, I noticed that the middle ring is attached to the crankarms with the same chainring bolts as the large ring. If I remove the middle ring will I need new, shorter chaingring bolts in order to secure the large outer ring to the crank arms -- or will the exisiting ones work? Or worse, am I screwed all together and can't remove the inner rings at all?
Here's the link to the model of crankset I have: