I've seen Coopers that just aren't round even when new. They will get worse as they age. Drive the car around a bit to warm things up (and get rid of flat spots from sitting) and then lift the tire off the ground and spin it while watching the space between the tire and the ground. Out-of-roundness bad enough to feel will show up somewhat obviously. Also look for a bent wheel rim. Michelin Pilot Exalto are my current preference. Rears have to be 225-60-15. --- In dmcnews@xxxxxxxxxxxxxxx, "Paul" <paul.sweet@...> wrote: > > Can flat spots and 5 year old rubber be a factor? Should I replace tires every so many years regardless of miles on them? Is a better tire recommended for smoothness and rubber quality? Thanks, > ------------------------------------ To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnewsYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: dmcnews-digest@xxxxxxxxxxxxxxx dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/