Spaceable BB?
 

here is the dillimma... i have this frame i built. and im trying to build it up, but i have a stumbiling block. when i put on the cranks i had planned to use the drive side crank arm hits my chain stays... what are some ways around this? i wan't some profiles but they are a little much for me right now. any other options... it is barely hitting. 2 or 3 16ths would be all it would need.
thank you much.

drift punch and hammer

you could hit it. or you could go get a bottom bracket thats the right size. A shop will be able to determine the size you have and the size you need. either way is going to work.

bring in your present, too short BB. Ask for one with a spindle that's like 4-7 mm longer.

I just had this issue with my conversion and I had to releive the chainstay a little more drif punch and hammer because it was too tight to acheive proper chainline

use a smaller chainring, and correspondingly smaller cog for the same gear ratio with better chainstay clearance.

Changing the ratio won't keep the crankarm from hitting.

There are bottom-bracket spacers out there. They will work as long as the non-drive side will have enough room to clear when you put it in.

A punch relief is a good idea, but I'd clear it with your shop first. Nothing worse for a bike than a dummy with a hammer.

Safest way is to just get a new, longer BB spindle. But that might throw off chainline. Tread lightly.

Oh, I misunderstood. I thought the problem was with the chainring not clearing. Phil, and Miche BBs can be adjusted a couple MM either way, but that might screw chainline. A different crank might place the arms out farther without moving the chainring out. If it's a road crank you could use a bb to put it out about 3mm further, and use the inside of the spider instead of the outside.

cleared it iwth my buddy that build frames and cleared it with my own metal working background es wirky good on about 1 maybe 2mm

Whacking it is fine, but if you need like 1-2 mm just put a spacer on the BB and a spacer on the hub as well.

For the OP, you need a new BB. Have you even considered chainline yet?