I don't really know what the supposed issues with UHD tubes are but I do know that I run (and have run for the past 7,000 miles or so) Michelin UHD tubes in both my tires. I've also run the bike at some serious speeds (80+ offroad , and well over 100 on tarmac - closed course of course
) with no issues so far. The high speed riding is irregular and of course, something bad could happen one day...but so far no issues.