Berrybike, my disc is well used so I don't think you would want to trade (best off buying a new one). Using 5mm worth of washers sounds like a good bodge but I'd rather spend a bit of money and get the brake set up properly. So are there no 190 adapters about to buy then? What is the biggest disc I could run with an adapter? I don't really want to go smaller as I love the bite with the 190 hope. I found an adapter on CRC, would this be any good with a 205 disc? http://www.chainreactioncycles.com/Models.aspx?ModelID=778 What adapter would I need to run a 185 rotor?