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Square Up the Tire Sizes
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09-14-2007, 08:28 AM | #1 |
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Square Up the Tire Sizes
What do people think of running 245/40/17 on all four corners? I think the staggered set up looks good, but you lose front/rear rotatability and you promote understeer. Car is a 335xi, so gotta get the balance a little more neutral.
For the e46, I've read that a lot of advanced drivers would "square" up their set up and ditch the staggered set up. I don't see why it would be different here. Any thoughts? |
09-14-2007, 01:37 PM | #5 | |
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Next I am going to read less camber on the front is better for handling cause it wears you tires more evenly.... |
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09-14-2007, 02:01 PM | #6 | |
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09-14-2007, 02:42 PM | #7 |
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I think we're all on the right track here.
Everything else equal...staggered setups will tend to understeer more than a non-staggered setup. But my personal experience is that this can be quickly adjusted by playing with tire pressures (higher PSI in the front than the rear tires). Staggered setups have the main advantage of looking aggressive...but also provide extra traction for the rear drive wheels. I believe this probably more important on a high powered 335i as opposed to my lowly 325i. This undoubtedly will help in handling and allowing one to power out of corners with more authority. Non-staggered setups will not look as nice, but you save some money on the intial cost of tires as smaller tires cost less...and you will be able to rotate the tire prolonging life. IMHO...I think the cost savings from going non-staggered is not worth it. I'd rather have the aggressive look instead. |
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09-14-2007, 03:00 PM | #8 | |
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Really? where is that proven? On internet message boards by people who know about as much about car set up as my 2 1/2 year old? What criteria is this based on? Give me a break. You prove your ignorance by making such a blanket statement as the one above. A RWD car does not need a staggered set up to handle well and putting a staggered set up on a rwd car does not make it better than a set of matched size tires on the same car. So much more goes into "handling" that just tire size. I will give you my 335 if you can lap faster in a 335 with 225's up front vs. 255's of the same tire. |
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09-14-2007, 03:07 PM | #9 |
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FWIW, if the suspension calibration is correct, non-staggared setup will handle better.
The original 95 M3 came with 235/40/17's all around. The car handled extremely well but in inexperienced hands could become tail happy too quick. Thus in 96+, they went with a staggared setup to induce understeer quicker creating a safer driving situation. Many people went aftermarket and back to non-staggared on the car to provide the very neutral handling the car was meant to have.
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09-14-2007, 03:08 PM | #10 | ||
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I agree...I think staggered will induce more understeer on our cars in stock form. But I still feel you can counter this by playing with PSI. Or...and an aftermarket rear sway bar will also help. |
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09-14-2007, 03:16 PM | #11 | |||
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09-14-2007, 03:19 PM | #12 |
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For winters, I think I'm going to try 245/40/17 Dunlop 3D's mounted on Kosei K-1 Racing 17x8.5 on all 4 corners. I think the offset is 40mm. If the rear looks too tucked, I guess I can use a spacer...
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09-14-2007, 03:22 PM | #13 | |
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09-14-2007, 03:23 PM | #14 | |
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If you dial out the understeer on a staggered setup, shouldn't that still handle nicely in comparison to a non-staggered setup? Or does a sorted out staggered setup still have more problems (like snap oversteer?)??? |
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09-14-2007, 03:25 PM | #15 |
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Here are the calculations if I get the Kosei K-1 Racing with 40mm offset to replace the staggered 18" sport package rims on a 335xi:
Front: 12mm LESS clearance on the strut side, and the outside edge of the wheel will extend to THE SAME point as the stock wheel Rear: 3mm LESS clearance on the strut side, and the outside edge of the wheel will RETRACT 3mm Would I be okay with the fronts, or should I use spacers all around (maybe 10mm spacers...) |
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09-14-2007, 03:28 PM | #16 | |
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Well, I live in CA and I only see snow 2-3 times a year so I am by no means an expert in what works well for cold climates, but I thought the general school of thought was a narrower tire works better in the snow? Like 225/45/17? I would not worry too much about the looks of the tire in the fender during the winter. I’d be more concerned with keeping the salt/sand/snow/ice off the car. That crap destroys paint. |
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09-14-2007, 03:38 PM | #17 |
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Yes. The wider tire will have to work less hard to brake, accelerate, and corner (less heat). And will last much longer into a session/race before it gets greasy. Not too mention with more contact patch it will brake more efficiently.
Yes it will handle nicely and if done properly with suspension mods and alignment changes you really would not notice much difference. Heat may be a factor for the front tires though. Personally if I were setting my 335 up for track days/racing, I would go the other direction and try to make the rubber as close in size as I could and then work the kinks out via suspension parts and settings. |
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09-14-2007, 03:42 PM | #18 | |
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I don't care about salt/sand/snow/ice - leased car... :P ) |
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09-14-2007, 03:50 PM | #19 | |
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