[OUGrad05]

Guys I'm officially in production. I've got a few questions.

Has anyone moved from the 245/255 stagger to a squared setup? Any reprogramming we need to worry about on something like that? I won't do it immediately but probably at first tire replacement I will move to a squared 255 setup.

Also, anyone done any extended warranty? I'm primarily concerned about the battery/drive unit. Do I purchase when my car arrives or wait till I'm into the warranty period a bit?

Any idea on the warranty options for the car?

[Technic]

I have been using squared wheel/tire setups in BMW for the last 15 years, no programming done or required. I just keep the tire circumference within 1.5% of the OEM and no issues found.

Example: my i4 M50 squared setup would be 255/35-20, from OEM 255/35-20 front, 285/30-20 rear. That is 0% difference from OEM front, and -1.1% difference in circumference OEM rear. I can rotate tires and even expect better range with a narrower tire in the rear, without issues with the xDrive system.

[rmklaw]

I got the Extended Warranty at the time of pick up the car out of concerns of future price increases. Went for the 7 years.

[OUGrad05]

Originally Posted by rmklaw

I got the Extended Warranty at the time of pick up the car out of concerns of future price increases. Went for the 7 years.

How much was it? what did it cover?

What do future price increases have to do with the extended warranty? I'd expect cars to get more expensive in the future? Am I misunderstanding what you're saying?

[rmklaw]

I am talking about price increases on the Extended Warranty. As the car gets older, they charge you more. It cost me $6,000 full coverage/no deductible for 7 years/75K miles. I also got the Extended Maintenance that covers consumables including brakes, brake pads, etc.

I feel that I am covered if I keep the car. If I don't use the Extended Warranty by the time I sell the car, I get a refund. Done that before with another BMW, Porsche, etc.

[larbel]

Originally Posted by Technic

I have been using squared wheel/tire setups in BMW for the last 15 years, no programming done or required. I just keep the tire circumference within 1.5% of the OEM and no issues found.

Example: my i4 M50 squared setup would be 255/35-20, from OEM 255/35-20 front, 285/30-20 rear. That is 0% difference from OEM front, and -1.1% difference in circumference OEM rear. I can rotate tires and even expect better range with a narrower tire in the rear, without issues with the xDrive system.

I wouldn't do that if I were you.. The 20" rear wheel is 10J, and the min width that any manufacturer would suggests would be 275... The tires could literally get rips off the wheels if it's too narrow for the wheels at high speed...

[WER2XU]

Originally Posted by larbel

I wouldn't do that if I were you.. The 20" rear wheel is 10J, and the min width that any manufacturer would suggests would be 275... The tires could literally get rips off the wheels if it's too narrow for the wheels at high speed...

pretty sure that is a WHEEL and tire swap.

[Technic]

Originally Posted by larbel

I wouldn't do that if I were you.. The 20" rear wheel is 10J, and the min width that any manufacturer would suggests would be 275... The tires could literally get rips off the wheels if it's too narrow for the wheels at high speed...

Reusing the OEM wheels with same tire sizes is not a squared setup.