Made the jump to a disc 135mm bike and I have a set of MTB crests laced to DT 240's that I can use to try out tubeless rather than jump right into a 135mm disc tubular set. Is there any reason to consider the Iron Cross over the Crest for a non UCI regular series cross racer? I know the tire will size out larger than it's listed diameter but other than frame clearance what other issues should I be concerened with? For those out there running crests or iron cross rims you opinions would be appreciated.