Odd BMW choose to use staggered setup on Xdrive

LaserPower · 04-26-2015, 07:19 PM

The more I drive my car, the more I am baffled by the fact that they choose to use a 225/255 combo on m sport package rather than staying with a square setup. They used a different setting on Xdrive for suspension, so why not a different the tire width? I opted for a 225/225 winter setup and it still understeers. My 225/255 summer have more grip, but understeers even more with the wider rear tires...if it is RWD then sure. but AWD with staggered is just...questionable

schach23 · 04-26-2015, 07:34 PM

Why I went with a square setup.

LaserPower · 04-26-2015, 07:40 PM

Quote:

Originally Posted by schach23

Why I went with a square setup.

But it still understeers. I am tempting to put 235 or 245 in front and leave the rear at 225...225/225 square understeers so I don't see how 255/255 will be better

mashimarho · 04-30-2015, 02:03 AM

It's still within the 1%, so there's nothing wrong with staggered on xi

LaserPower · 04-30-2015, 08:21 PM

Quote:

Originally Posted by mashimarho

It's still within the 1%, so there's nothing wrong with staggered on xi

Are you referring to the outer circumference of the tires? I was not talking about that. I was referring to tire width. Fitting wider tires in the back will cause the rear to have more traction than the front, which will cause the car to understeer more. It is fine with cars that naturally oversteers, such as a RWD model. But on a xdrive, which naturally understeers a bit even with the default 40/60 power split, fitting wider tires in the rear is just asking for more understeering on an already understeering base. I fitted a squared setup for winter and it still understeers, so it does not make any more sense to fit wider rear than the front.

only1harry · 05-10-2015, 01:57 PM

Wheel alignment will help. Aging shocks, suspension components, etc. can cause more understeer over time. Maybe time for shocks/springs, new bushings? I had a little understeer when I bought the car but I did a custom alignment and it fixed that. The car felt much more neutral and took corners faster. It even understeered a bit.

I didn't start getting understeer again until after my shocks started going. Stock shocks don't last very long. Shocks is the heart of your suspension.

Harry

04-26-2015, 07:19 PM	#1
LaserPower Private First Class 22 Rep 175 Posts Drives: E90 330xi -> E90 N55 Join Date: Nov 2014 Location: Canada iTrader: (0)	Odd BMW choose to use staggered setup on Xdrive The more I drive my car, the more I am baffled by the fact that they choose to use a 225/255 combo on m sport package rather than staying with a square setup. They used a different setting on Xdrive for suspension, so why not a different the tire width? I opted for a 225/225 winter setup and it still understeers. My 225/255 summer have more grip, but understeers even more with the wider rear tires...if it is RWD then sure. but AWD with staggered is just...questionable __________________ 2011 335i xdrive Jerez Black Limited Edition Manual
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04-26-2015, 07:34 PM	#2
schach23 BMW enthusiast 62 Rep 392 Posts Drives: BMW e46 M3 Join Date: Apr 2013 Location: Ohio iTrader: (4)	Why I went with a square setup.
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04-30-2015, 02:03 AM	#4
mashimarho BimmerPost Supporting Vendor 2172 Rep 13,877 Posts Drives: E92 M3 & F80 M3 & G82 M4 Join Date: Mar 2010 Location: Lynnwood, WA iTrader: (45) Garage List 2021 BMW G82 M4 [0.00] 2011 BMW E92 M3 [0.00] 2015 BMW F80 M3 [0.00] 2012 BMW 335i xDrive [9.78]	It's still within the 1%, so there's nothing wrong with staggered on xi __________________ Mashimarho.com /// Instagram /// Facebook /// Youtube /// sales@mashimarho.com /// (425) 582-7939
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05-10-2015, 01:57 PM	#6
only1harry Second Lieutenant 43 Rep 257 Posts Drives: 2011 E92 335i xDrive Join Date: Nov 2013 Location: NY iTrader: (0)	Wheel alignment will help. Aging shocks, suspension components, etc. can cause more understeer over time. Maybe time for shocks/springs, new bushings? I had a little understeer when I bought the car but I did a custom alignment and it fixed that. The car felt much more neutral and took corners faster. It even understeered a bit. I didn't start getting understeer again until after my shocks started going. Stock shocks don't last very long. Shocks is the heart of your suspension. Harry __________________ 2011 Space Grey 335i xDrive E92, Sport Pack/Premium/Winter/Navi rolling on 342's. 2019 Accord Sport 2.0T 10-sp.
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