Having retired from truck driving(43 years teamster with more than adequate pension),I have seen and experienced enough tire failures and subsequent equipment damage to know that to ride along side or to follow within 100 yards of truck is to ride irresponsible.pay another dollar to compensate your fuel loss and safety gain.I just returned from road trip 550 miles roundtrip and average 51.6 mpg...here at home with normal stop and go42 mpg.On trip I rode 65-70..seem to be the sweet spot for my america..handled great and only battling cross winds did I wish to be a little heaver..slowing down to 55-60 helped at those times.Ride safe and stay away from trucks!!
