I would not ride that thing no matter the price. Those are really thin CF stays to start with, and even drilling aluminum like that would make me nervous. Coupled with the forces that thing undergoes during braking (lets see.. F=ma. If you and the bike weigh 165lbs, that's 75kg. Let's say you're going 25mph (11.2 m/s) and want to slow to a stop over 3m (~10ft) in an emergency. That's an average negative acceleration of 20.9 m/s/s. Plug it back in, and you get 1568 N exerted on those two little seatstays.. those are a lot of newtons, my friend. It would be roughly equivalent to a guy twice your weight standing on them, but while wearing ice skates because the contact surface area is so small.) I wouldn't be surprised if they cracked eventually.
Sorry, I've been studying a lot of simple physics recently.
You know, if you're riding it fixed you likely won't be using a rear brake.. well either way, I wouldn't trust it.
Last edited by Boss Moniker; 12-09-07 at 08:31 PM.