[CapriRacer]

Originally Posted by cyclopathic

Thanks for the links, good summary. Unfortunately it does not answer my question on contact patch. I remember seeing a high speed camera video of contact patch wave a while back, with explanation on how this impacts rolling resistance......

This is a speed related phenomenon and common to all types of tires. Yes, it does impact RR, so to reduce this phenomenon, keep your speed down. There's a chart around somewhere, but you'll have to dig for it, if you are truly interested. But, again, it is common to all tires, so it isn't something you need to worry about.

Originally Posted by cyclopathic

.....Also have you looked at EU efficiency labeling? Could not find tire database compilation with info on tire ratings.

I am not aware of anyone who has compiled a summary on the EU labeling. NHTSA publishes a summary of the UTQG ratings, but that does not include RR as a rating point - perhaps in the future.