I was asked a question by someone in my ride group about designing a custom steel frame that would be fit for disk brakes. This came up in relation to a discussion about the upcoming SRAM road hydralic disk brakes for Red and Force. I don't have any idea, so I thought I'd ask the experts!

Is it a simple matter of just putting the relevant mount on the triangle at the back end of the bike (presume that fork will be carbon/off the shelf), or is there more to consider (road 'race' frames often being lighter than touring or MTB frames)?

- Extra bracing? Mounting side only or both?
- Choice of tubing? Avoid certain things?
- any geometry concerns (turkey wobble) from disks that you can get?


Details:
- cable routing?
- braze on types? Hydraulic lines need those open style (ie clip or cable tie on later)?