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Pros and cons of low-profile tires on IS350?

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Old 03-17-11, 06:45 PM
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calvin2376
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Default Pros and cons of low-profile tires on IS350?

My 2007 IS350 is on 18" ISPs with very low-profile tires. I don't know the size or brand off-hand but the picture's below. These were the wheels and tires that came on the car when I purchased it about 2 months ago.

I'm just wondering your opinion on low-profile tires vs. regular-profile tires. I've never driven a car with as low-profile tires as these. Even my E55's tires had a taller sidewall.

I have noticed that my car is incredibly prone to tramlining, especially on some roads around me that have grooves in them. I've also noticed the ride seems harsher on my car than in the loaner IS's I get. The wheel wells also look oddly empty with such low-profile tires. Obviously that could be solved with larger rims too, but that's not in the budget..

Hopefully I won't have to upgrade tires for a while, but when I do, what general pros and cons of low-profile tires should I keep in mind? I'd likely be getting all-season tires, since I don't want two sets of wheels/tires (one for summer, one for winter) and the winters in Maryland are bad enough that I'd need some all-season capability, but not extreme enough to warrant completely separate tires for winter.
Attached Thumbnails Pros and cons of low-profile tires on IS350?-photo.jpg  
Old 03-17-11, 06:52 PM
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twenty
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I don't mind my low profiles, I have a set of summer and a set for winter (Canadian winter, mind you). Make sure you do some research on the tires you are looking at... you'll find good information such as road noise and wear patterns.

On a side note, I love those wheels!
Old 03-17-11, 07:00 PM
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dubsesd
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You need 225/40/18's

You should stay close to the oem wheel diameter. It would help if you provided what tire size and brand you have
Old 03-17-11, 07:00 PM
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shadowman
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Pros - it helps you handle better on the corners with less side-wall flex. But that's only if you drive like a demon on the road. It also looks great.

Cons - If you have light weight rims, it's more likely get bent if you hit a speed bump or pot hole. You also feel every bump on the road.

I remember my bros Ford Taurus will bloated tires, and you can blow right through a speed bump and we won't feel a thing.
Old 03-17-11, 07:02 PM
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calvin2376
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Originally Posted by twenty
I don't mind my low profiles, I have a set of summer and a set for winter (Canadian winter, mind you). Make sure you do some research on the tires you are looking at... you'll find good information such as road noise and wear patterns.

On a side note, I love those wheels!
Haha thanks, they're Lexus and surprisingly quite reasonably-priced, especially if you go through Sewell. I had no idea they were on the car when I went to look at it but I think they look great with Obsidian.

I don't necessarily dislike the low-profile tires, I just haven't driven an IS350 on anything else so I don't know what the alternative is like. Why'd you go with low-profile tires?

Last edited by calvin2376; 03-17-11 at 07:05 PM.
Old 03-17-11, 07:04 PM
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calvin2376
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Originally Posted by dubsesd
You need 225/40/18's

You should stay close to the oem wheel diameter. It would help if you provided what tire size and brand you have
I'll look tomorrow and post. Why do you say I need that size specifically? And when you say stay close to the OEM wheel diameter, do you mean the diameter of the OEM wheels + tires?


Originally Posted by shadowman
Pros - it helps you handle better on the corners with less side-wall flex. But that's only if you drive like a demon on the road. It also looks great.

Cons - If you have light weight rims, it's more likely get bent if you hit a speed bump or pot hole. You also feel every bump on the road.

I remember my bros Ford Taurus will bloated tires, and you can blow right through a speed bump and we won't feel a thing.
I drive quickly, but probably not enough to truly appreciate the benefits in cornering. Because I do a lot of highway driving, I'd probably appreciate the better ride quality regular profile tires would offer.
Old 03-17-11, 07:06 PM
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twenty
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Originally Posted by calvin2376
Why'd you go with low-profile tires?
Cosmetic, and for the handling benefits. I tend to get nauseous in cars that drive like they're driving on air (Buicks are the worst). I also have IS350 calipers on my car, so I can't go lower then 18s...which can only fit a low profile tire. Even the 17" wheels that come on the IS are fairly low profile..
Old 03-17-11, 07:07 PM
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well I have 235 40 18s on my fronts right now and they rub slightly on OEM 18s so ill be switching back to 225 40 18s so if your wanting a thicker tire your going to have to swap to small rims like 16s or 17s which would ruin the look of the car. If you want a softer side trade it in for an ES350 or any of the other sedans for that matter. Oh and the rears will be 255-40-18 if your running the OEM staggarded set up.
Old 03-17-11, 07:09 PM
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I was about to recommend the IS300 17s since they look nice and you can get them cheap with big tires but clearing your Is350 brakes is going to be rough...Ill trade ya for my Is250 Brakes and Rotors
Old 03-18-11, 09:07 AM
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IonSpray35
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Has anyone tried going wider on the stock 255/40/18?
Old 03-18-11, 09:18 AM
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My 35 series tires seem to be thiner than the pic you posted maybe you have 40 series? I wouldn't put anything more than 40 series bec it probably won't handle as well don't know if it would fit well either since the stock size rubs a bit.
Old 03-18-11, 07:48 PM
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calvin2376
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I just checked, I have Hankook Ventus V4 ES 225/40ZR-18. Tirerack lists them as "Ultra High-Performance All Season".

What brand and size of tires come stock?
Old 03-18-11, 11:54 PM
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raptor22
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Originally Posted by calvin2376
What brand and size of tires come stock?
not sure the brand, but the stock staggered 18" uses 225/40 for front and 255/40 for rear.
Old 03-19-11, 12:18 AM
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Bridestones on Dunlops come stock...Im running Hankook Ventus V12 summer tires but in your state all season is probably a must.
Old 03-19-11, 12:19 AM
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your saying you have 225s all around? Your rears should be 255s and fronts you could go 235 with a little bit of rub every now and then but nothing worth bragging about.


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