done a search and have read the problems people had trying to get the calipers close enough in t take a 280mm disc. i have had an idea of how to get them closer though. isntead of trying to mount the caliper centrely to the existing holes, offset the caliper to 1 caliper bolt hole is on the middle of the 2 hub bolt holes, then you can bring the caliper further in. thats my theory anyway.