I recently noticed a small crack at the bottom of the left seat stay on my Y2K Trek 8900SL. Of course, Trek has a lifetime warranty on frames, so they should replace it with little fuss. The problem is this: my bike came outfitted with linear-pull brakes. The replacement frame for my bike will likely be an 8500, which does not come with linear-pull brake studs (they are disc only). This means that I will not be able to transfer my current wheels or hubs to the replacement frame, and will also need to switch to disc brakes. Do any of you have knowledge regarding this matter? Should I have to foot the bill for all those parts solely because Trek changed their design?? If so, that is pretty unfair. Thanks for your input.