bad vibes from bad tires?

[alphabets13]

i took my X to my mechanic today and it was detyermined that the famous 60 mph and up shake was b/c of my tires. they said they were worn uneven and cupped a little. i thought maybe it was th u-joints but they were fine along with everything else,ball joints,aligned,etc.,etc.. they said at that speed rating of 60mph and up i was getting the vibration from. anyone else solve the vibes with new tires? also what speed rating am i looking for in my new tires to be able to go high speeds? thanks

 

[jcar302]

Sound's like unbalanced tires to me, that will cause a nice vibration. What kind of high speeds are you talking? Size?

 

[alphabets13]

actually the tires have been balanced and rotated often. it's just that they are no name tires(wide conquerors ?) and they came with the truck almost brand new and in a year they are worn. they obviously suck. by high speeds i just mean highway speeds like 60-80,85 mph. it was always aggravating on highways cuz the truck would shake like heel above 65 mph.

 

[jcar302]

I use pirelli scorpians 255/55/18, great for handling, and they are a fair price, i think about 125 or so on the tirerack. I would also suggest a new alignment from a repudable shop.

 

[alphabets13]

actually i am probably getting the scorpion at's off of tirerack. 31's for only $81 ea. i think it is. also it was not an alignment. it has been aligned by a reputable shop twice in the last 4 mos. i had brake work done and shocks, so i got it aligned often. hoe are your pirellis on ride comfort? since they are a softer tire i heard that they ride nice. thanks for the help

 

[jcar302]

hard to tell, my suspension is very tight, my x handles like a car but rides like sh*t. My overall ride quality sucks, so i can't give you an accurate assessment. Someone will see the post and tell you, if not i'm sure there is a ton of posts with those tires on em.

 

[alphabets13]

yeah, most siad they ride nice. but you have 18's, i'm talking 31's. is your X a sport truck? sport tires usually run a little rougher. especially with a performance suspension. thanks