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It's from an old style reflector, the metal is pretty chunky @3.5mm, the first time it slipped around but tightening it right up on the half moon washers did the trick. I actually have an extra long drop but wanted to see if this would work and do a long term test including fitting a camera to record to see if there is any/much flex under braking. Chopping it will require some heftier cutting tools than I posess, I'm not too fussed as it's under my arse ;) If the same bracket was curved around in a tight U that would be perfect to support it from both sides then no flex (of any note) could possibly occur.
I have some lovely lightweight 27" hookless clinchers that I have had on it but wider 27s don't sit on the bead as well as I'd like them to and these old stock 32mm Vredstein's have been kicking around and giving me evil looks and they are superb so worth the bodge :o)
It's had 4 different builds in the 10+ years I've owned it including 8 speed with Dura Ace STIs so I'm not unaccustomed to farting about with it!
Mr_Bump-
My neighbour has been riding to work and back for years on a similar set up. Never had any issues, even on the massive hill he has to go down on the way home. I think his loops over the top of the bridge and back down the other side, with the bolt going through the metal bit twice, if that's makes sense. Or maybe it's just 2 bits of metal.
AlexD
Wo.. looks kinda scary. Im surprised it didnt rip off or bend under testing. Have you tried long reach dual pivots?
But if that bracket is the solution your going with, at least trim the excess metal :)