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Old 11-16-2004, 09:48 AM   #1
ronan1975
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Default Why should i goto 17"

I'm looking to improve my handling by getting a wider tire.Why should i goto 17" wheel with a wider tire and not stay at 16" and put a wider tire on that. Is the handling difference big between 16" & 17" wheels. I don't care about the look just the handling.
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Old 11-16-2004, 09:51 AM   #2
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17 tire will have a shorter sidewall than a 16. Shorter sidewall will flex less on identical tires.
The width of the tire has a lot to do with it as well. Many of the 17 wheels are 7.5 inches wide, while the stock WRX wheel is only 6.5 inches wide.
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Old 11-16-2004, 02:30 PM   #3
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The best inexpensive thing you can do is put 225/50- 16's on your stock rims. Maintain the lightweight stock rims and also keep the stock, low key look. True the rim is a bit narrow for 225's, but within spec.

But if you want to upgrade, Rota is, finally, going to offer affordable 16X8 rims for the WRX, so you can put even wider tires on and no have to deal with the added weight and poor ride of 17's.
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Old 11-16-2004, 03:27 PM   #4
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A 225/50R16 will handle almost as well as a 225/45R17....in some cases slightly worse in some cases slightly better. A 225/45R17 has a slightly (and I do mean slight) larger contact patch which will improve your extreme lateral grip on a smooth surface such as a track, but you lose sidewall flexibility which helps on uneven road surfaces (less likely to suffer from tire bounce). The real reason to go up to 17" is if you plan to put on a bigger brake kit. Other factors like overall unsprung weight also can affect your handling...general rule of thumb lighter is better. On another note, your ride quality will change quite noticeably for the worse with 17" or 18" wheel setups.

Last edited by Dueysan; 11-16-2004 at 03:32 PM.
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Old 11-16-2004, 08:40 PM   #5
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only two reasons to get bigger rims:

1. to fit bigger brakes
2. bling blAng

other than that, what you are debating is totally negligible. just get some 225-50-16 size tires for your stock rims. it will feel like a totally different car.
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Old 11-16-2004, 10:49 PM   #6
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The best option is what i have done:

225/45R16s on RS 16X7 rims. trading slightly lower top speed (which frankly none of us ever see) for better sub-maximal acceleration (less wheel torque) and slightly poorer mileage (higer revs) at hwy cruising speeds. andof course car sits slightly lower so some handling benefit due to lower center of gravity. and yes - slight speedo error which saves on tickets and of course you get to warranty deadline a few weeks early

i have yoko avs100s which are sort of noisy but handle well...

tim
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Old 11-16-2004, 11:13 PM   #7
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With light tires like the Kumho MX on my 17x7.5 SSR Comps, the wheel/tire combo is lighter than the stock wheel/tire combo and fits over my 4-pots with room to spare.....

I don't think I need 18's...but if a set of the 18" SSR Comps were to come along cheap I might bite
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Old 11-17-2004, 08:50 AM   #8
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Quote:
Originally Posted by YinUCSD
only two reasons to get bigger rims:

1. to fit bigger brakes
2. bling blAng
this is the bottom line. put your money into better tires, and if you do decide to upgrade your wheels, go for a wider 16" wheel. you'll notice in motorsports most teams go for the smallest diameter, widest wheel that will fit over their brakes.
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Old 11-19-2004, 07:50 AM   #9
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Quote:
Originally Posted by Pinksprings
The best option is what i have done:

225/45R16s on RS 16X7 rims.
Wish I'd thought of that a year ago.
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Old 11-19-2004, 09:05 AM   #10
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the simplest answer.....Why Not??
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Old 11-19-2004, 09:13 AM   #11
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Quote:
Originally Posted by YinUCSD
only two reasons to get bigger rims:

1. to fit bigger brakes
2. bling blAng

other than that, what you are debating is totally negligible. just get some 225-50-16 size tires for your stock rims. it will feel like a totally different car.
Reducing sidewall flexibility by having a shorter sidewall seems valid.

I have a set of 16's and a set of 17's for my wagon. Ultimate grip is better with my 16's because they have Falken Azenis (RT-215) tires. The 17's have Proxes 4's. Steering response off center is about the same for these two sets, but this is because the stiffer sidewall of the Azenis is also 1/2" taller, so the total flexibility is similar.

Last edited by 2Stroke; 11-19-2004 at 09:20 AM.
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Old 11-19-2004, 12:06 PM   #12
whtlegacy
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Quote:
Originally Posted by MyRuRex
the simplest answer.....Why Not??
-heavier (generally, except for the more expensive ones)
-more expensive
-more expensive tires
-less sidewall leading to rougher ride and easier damage to rim
-more weight farther from the center of rotation leading to slower acceleration
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Old 11-30-2004, 11:26 PM   #13
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Quote:
Originally Posted by whtlegacy
this is the bottom line. put your money into better tires, and if you do decide to upgrade your wheels, go for a wider 16" wheel. you'll notice in motorsports most teams go for the smallest diameter, widest wheel that will fit over their brakes.
yup just look at f1, you dont see them running 19s or anything.
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Old 12-01-2004, 12:33 AM   #14
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Quote:
Originally Posted by YinUCSD
yup just look at f1, you dont see them running 19s or anything.
Lots of the JGTC Use 19's...... Not that I'm compareing the two (JGTC & F1) ...but there are motorsports that use such Rims sizes...
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Old 12-01-2004, 01:14 PM   #15
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saar - you are correct. some teams do use big wheels but you can bet it's still the smallest possible size that will fit around their massive braking systems. when rally cars use gravel-spec brakes, they run 15" wheels but the huge tarmac-spec brakes requre 18". F1 teams actually use 15" wheels IIRC. The reason they are able to go so small I believe is that their brakes actually operated not within the wheels but behind them.
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