I have the EAI/Promax aka just Promax one from Ben's Cycle. My fork is a bit wider than both the oval and round clamps they provide so I had to alter it by rearranging the clamp. With that there is a bit of flex, movement at the joints and it's a bit sketchy. But its just an extra safety measure for me. I do wish I had bought a new fork instead of getting this brake.