I regroove bars and not many of the laminated bars can be cut. The center plate is to low in hight so you cut in rivets almost instantly.
2mm is usually it, and that is not enough to do it right and lasting.
Not all bars have sprockets you can get seperately either.
If it is just slightly worn...
It depends on why it is wider. Is it bent or worn?
It also depend on what bars you have and chains you run. It's not all bars that you do good to fix up.
If it is a cheep laminated bar I would not do anything but replace.
Closing rails that is worn out usually isn't doing much good as they...
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