Apologies for the fact that I know this topic has been raised many times before, but I want to put a dual pivot brake on the front of my old steel road bike. I've attached a picture of it and I'm concerned because my fork crown is thin. I haven't seen any pcitures of conversions so I was wondering whether people think it'll be OK to enlarge the hole from 6mm to 8mm?
It's not the drilling that scares me per se (even though I've only got a basic 500W electric drill and cheap bits), it's just the fact that my fork crown looks so thin.
Any help would be much appreciated. Thanks!