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Posted

Ok I love the complete look of my new IS350 with the 18in wheels however, I really don't like feeling every bump in the road. Are there better tires to soften the ride?

Posted

Unfortionaltely thats a characteristic of the IS with the high performance 18" wheels and low profile tires.

Posted

What tires do you have?

Potenza RE 050 225/40r18 (front) 255/40r18 (rear)

Mine came with the Dunlops. I haven't noticed the ride being uncomfortable or unusually harsh, but then I was driving a IS300 before. It may depend on what you were used to before. Actually I find the ride quite good, but nicely snubbed when it needs to be.

Posted

if you think the IS is bumpy, dont ever buy a 3-series or X3 and certainly dont buy a BMW with sport package. trust me the IS is pretty smooth for a sport sedan

Posted

I'd try finding an IS250/350 owner locally that wanted the 18in wheels but did not get the sport package. See if they will trade you their stock 17" wheels + cash for your 18's

Posted

Can't say I know the feel of the 18's, but the 17's are pretty bumpy as well. Suspension feels great, but still stiff when it comes to dampening small imperfections on the road. Simply a characteristic of low profile tires and short wheelbase.

Tho, one thing thats always bothered me, coming from my first car which was a Chrysler Sebring (was 215/50/17's), its ride did not feel nearly as harsh. The suspension on that car had something like a multi-coil design. Where the compression was variable. Wondering if this concept was implemented in the IS? I would hope so.

Posted

Well, push that Sebring into some corners and see how it handles next to your IS, its a barge. The rough ride of the IS is a combination of low profile tires, a firmly damped sport suspension, and a short wheelbase. You can't have your cake and eat it too...

The ES for instance rides on 215/50/17s and it rides totally differently than the IS, its designed for an entirely different purpose just like the Sebring was.

Posted

What tires do you have?

Potenza RE 050 225/40r18 (front) 255/40r18 (rear)

Mine came with the Dunlops. I haven't noticed the ride being uncomfortable or unusually harsh, but then I was driving a IS300 before. It may depend on what you were used to before. Actually I find the ride quite good, but nicely snubbed when it needs to be.

how much of a difference do you think the potenzas make. and also i opted for a tires for life package at my dealer where they will put factory recommended tires on, so when im needing these new tires, will i get dunlops or potenzas from the dealer? in other words are all new IS's coming with potenzas rather than dunlops?

Posted

Tires vary a lot and have a lot of effect on how the car rides and drives.

Posted

Several owners had their Dunlops replaced due to pulling from conicity. I know of one who got REO50 and he thinks they have a better ride than the Dunlops.

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