IS F (2008-2014) Discussion topics related to the IS F model

Need help selecting tires for the new 20"

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Old 02-28-10, 06:54 PM
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anson89
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Default Need help selecting tires for the new 20"

As you can see in my previous post, I have some new wheels. Here are the specs:
Front - 20x9 offset +30
Rear - 20x10.5 +42

I'm set with running Falken 452 tires and here's what I'm about to purchase:
Front - 245/35/20

Rears are the problem. I've read through several posts and opinions and this is what I rounded up:
275/30/20 - It makes my tires look so round and I really don't like that stretchy look.

285/25/20 - This is probably the best choice right now. Problem is, I have a higher chance of bending the wheels and blown tires due to the crappy Houston Road.

285/30/20 - I really really want to go with this one if possible. I'm just afraid it will rub and I have to shave my fenders? Risk of cracking the outer panels as well?

I don't plan on dropping my car because of the steep driveway I have. I don't plan on rolling my fenders as well, if I have to.. looks like I have no other choice.
Old 02-28-10, 09:20 PM
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K3RRYB
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I would go with a 275/30/20 in the rear. It wont be stretched that much and its a safer choice for your rims and also this is your first time testing out the fitment. Your rear offset is a bit aggressive as well even though you arent planning to lower it. If you go with anything larger you might risk rubbing especially when the suspension is maxed out. From there you can decide and see if 285/30 will fit next time you need to get tires.

btw pm'd you
Old 03-01-10, 10:22 AM
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N54MPower
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I'd go with 245/30 in the front and 285/20 in the rear. The 245/35 is a bit tall in the front and a 275/30 will looked stretched on the rear.

The difference between the sizes I suggested and the ones you want to use are negligible as far as rim and tire damage is concerned. If you're driving a car with a 20" rim the pothole that's going to bend the rim with one tire is going to do the same with the other. The difference in rim potection is a wash and the car will look better on the sizes I recommended. Keep your tires at 40 psi to help protect the rim.

As far as lowering goes, I would suggest moving . Seriously putting those wheels on a car with stock height is not going to look right.
Old 03-01-10, 12:07 PM
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primecut
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Originally Posted by N54MPower
I'd go with 245/30 in the front and 285/20 in the rear. The 245/35 is a bit tall in the front and a 275/30 will looked stretched on the rear.

The difference between the sizes I suggested and the ones you want to use are negligible as far as rim and tire damage is concerned. If you're driving a car with a 20" rim the pothole that's going to bend the rim with one tire is going to do the same with the other. The difference in rim potection is a wash and the car will look better on the sizes I recommended. Keep your tires at 40 psi to help protect the rim.

As far as lowering goes, I would suggest moving . Seriously putting those wheels on a car with stock height is not going to look right.
^ QFT. You might rub with 245/35 in the front even if you don't lower. FYI. So 245/30 is much safer. In the back, if you don't like the stretch look then go with 285/25.
Old 03-01-10, 07:10 PM
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n0th1ng
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you should get 285/30... 25 seems to much of low profile for F...
Old 03-01-10, 11:34 PM
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N54MPower
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Originally Posted by n0th1ng
you should get 285/30... 25 seems to much of low profile for F...
285/30 is too tall and will rub. Not to mention the fact that the taller sidewall will make it look like a drag radial. The "right" tire for the application bares little relevance to whether the car is a F or not.
Old 03-02-10, 02:11 AM
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n0th1ng
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Originally Posted by N54MPower
285/30 is too tall and will rub. Not to mention the fact that the taller sidewall will make it look like a drag radial. The "right" tire for the application bares little relevance to whether the car is a F or not.
it was just my opinion i dont like the way some cars look with 25.. not professional opinion.. but if it ends up rubbing shaving was an option for him so..
Old 03-02-10, 08:25 AM
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anson89
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thanks guys! decided to go with the 275/30 tires. Only problem right now is, it seems like the tires are not stretched enough to wrap around the lip. Probably having higher chances to curb rash.

Anyways, I'll wash the car today and finally take some pictures. It's been raining here
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