Yes i know what you mean, i built the wheel but i dont remember actually. But i had no probs with running exactly the same set up of wheel and brake when i had my GU fork. My only guess is that it`s the hubs fault, the GU hubs got spacers on their axles, making it less wide, and the spokes are going more straight up, instead of up in an angle if you understand? Or am completely wrong? Also tried to fit the wheel on another fork i had, didnt work there either, the hub bolts were too big.