Just got 19s Falken Azenis ST115 (245/35 & 275/30) and they were mounted and balanced but now I'm feeling every road vibration.... is this normal with 19s or is there a balance problem. The car has Koni/H&R setup as well.

 

I have 19" Falken Ziex ZE502 and I get a vibration that comes and goes. Usually the shake/vibration is @ 60mphs. I notice the shake/vibration goes away when the tires are warm. It's time for me to buy new tires and Falkens wont be my choice.

 

What were you riding before the 19s?

 

Stock setup (17s with 225/45 and 245/40).

I get the vibration at about 55-65 mph and then it goes away at higher speeds. At 100+ mph, it's smooth as silk... go figure! I think it may be just a balancing issue, but then I also noticed that my tire pressure seems a bit high... it's 34 psi all around... shouldn't it be about 30-32? Maybe the excessive pressure is making the tires a bit hard and causing additional vibration... just a thought?

 

I just got new tires on my stock wheels and have a slight vibration at the same speeds. Pressure isn't probably it but it's easy to figure out...just remove a little. I run 35 PSI and my tire dealer recommends at least that. Said I could go higher if needed. Let us know what you find out.

 

try road force balancing(not every place has it)

 

Can you elaborate on what this is? Never heard of it...

 

have u done on wheel balancing? meaning the front wheels are jacked up and balanced on the spot...over here we call it as " high speed balancing" running on 36 psi

 

btw mine is also falken st 115 235/40/18 and 265/35/18

 

you need hubcentric spacers..

 

rear wheels are cambered. get a wheel allignment and/or get camber kit from speedybenz.com

 

see here what it is:
http://www.hunter.com/pub/product/ba...159T/index.htm
you have a place locator too on the bottom of the sceen
I would suggest checking the wheel bearing play too(12 and 6 o'clock play)

 

he can try it.. but i'm almost positive that it's not that. bigger wheels, more camber.