You can't really chase the threads. If they're crossthreaded then they're toast. Best to bore it out, tap a larger thread, and put in a helicoil. A $20-30 job at the lbs.

Not here- it'd be a couple hundred bucks

and oyu need a larger crank extractor too

Wha...? Putting in a helicoil is just a 30 minute job if they know what they're doing. You don't have to take off the cranks either. The alu of the cranks is so soft which makes it easy -- but is also why a helicoil is the only way to go. But you do need the taps -- which makes it worthwhile for the shop to have, but not for consumers.

@RoboKaren yeah - I think you're assuming the pedal end of the crank. I'm talking about the BB end, where the crank extractor goes.

oh! those threads. yeah, you're screwed, man.

new cranks is the way to go.

mmmm this is a quad chainring... never seen one before. I'll use it as-is and if it breaks.... dunno.

:)

sorry 'bout that. ;-(

no appoloigy requirte

okay fewer typos on my part

all is good.