Wow, Viva 2's are low RR? I just bought two Pilot Exaltos (sp) to replace two Viva 2's

One was dry rotted and leaking, and I don't change only one tire (always in pairs - the one changed was plugged anyway

)....
Where do I find the RR ratings? The pilot's were top rated in class on tirerack.com and moderately priced ($100/ea).