Worn BB shell

[Roasted]

In the picture below you may see that the bottom of the BB shell doesn't protrude as far from the concentric pivot.

This due to the previous owner of my Arrow DSS-3 using a BB mounted chain device and then bolting it to the concentric BB pivot. This meant that the chain device moved with the wearing away the outside edge of the BB shell.

My question is what to do about it? Normally you'd get it faced, but due to the amount of material that would need to be removed, a BB mounted chain device may foul the pivot, or standard length BB would cause the chainring to hit the chain stays.

Would it be OK leave as is if using a standard BB? Or is there a way to lay a bead of weld to restore the worn area?

 

[novocaine]

face it then use a spacer on the BB to bring it back out.

 

[Lucidone]

As above and if you want to use a pivot mounted chain device machine/ file out the centre bore of the device to clear the entirety of the bottom bracket.

 

[Roasted]

I didn't think of that. Looks like 0.7mm and 1mm spacers are available.