Disk brakes are so weak compared to proper rim brakes. I did check with the manufacture and they told me I could put the largest rotor that would fit on. I did specify a frame that could handle a 350lbs ryder also. I hear so much about brake safety, I am starting to think the people that conjured up layer lips are sticking there nose into disk brakes also. Washing out the front wheel can happen on rim brakes even easier because of lack of modulation. Attempting to solve all issues that can happen by limiting usability by one size fits all engineering is not something I am willing to identify with. I am not with the crowd that believes you should adjust your brakes so it is impossible to be thrown over the bars. Even though the CPSC proposed this. You can go over the bars with no brakes. Braking is about balance as it is about stopping.