i bought a 2012 vista...goodyear 19.5g670's all 6 tires were out of round... and all 6 wobbled... good year swapped out 2 fronts... the coach still had a viberation..
so I took all 6 off and went with 22.5's....coach was smooth...
bought a 2014 fr3.... same thing...19.5s... took them off and went with 22.5's and smoothed it out...
bought a 2014 tribute....same thing.... good year swapped out only two and the coach had a viberation.... kinda like the drive shaft... but it was the tires..
traded the tribute for a 2015 excursion same thing with the goodyear 22.5s
goodyear only would swap out the fronts....
traded the excursion for a winnabgo class C 25'r.... no problems with the tires but I did put 19.5s on it
traded the class c for a 2015 26he vista.. same thing viberating shake... put the 22.5s on it ....smooth
traded the 2015 vista for a 2016 26' sunstar....horrible shake... went to the truck tire shop..the driver front was 14 oz out of balance...and all the rest were 6oz to 8 oz out of balance
all the tires wobble side to side and are out of round
the swapped the two fronts for new... one of the new was good... the other has a bad wobble..... the 4 rears all balanced to 0 but wobble.... goodyear blamed the rims..
so I swapped the steel wheels for aluminum wheels...no change... wheels spin purfect....tires wobble.....
I personaly think the the tire shake and wobble make the coach not track true and the tires get hotter than they should....
going back to the tire shop tomorrow.... it rides like a car that sat for too long and has flat spots..... the viberation starts at around 45/50 mph and gets worse to 78mph....all that shaking can't be good