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After watching the crab walk again I'm curious how different wheels and tires would affect this. Obviously they would have to be very close to the same offset, backspacing and all of that, but wonder if an aftermarket wheel and the optional 37" tire would operate the same way.
 

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Discussion Starter · #6 ·
After watching the crab walk again I'm curious how different wheels and tires would affect this. Obviously they would have to be very close to the same offset, backspacing and all of that, but wonder if an aftermarket wheel and the optional 37" tire would operate the same way.
I am going to assume GM clearances everything for the 37's on the same wheels, so backspacing will be critical on aftermarket wheels.
 

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For sure I know the 37s will fit if they offer it but wheels will be interesting. Even options like wheel weight will need to be similar.
 

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Also curious how crabwalk and 4 wheel steering are going to affect longevity of tires and pattern of wear. Will all tires fair equally or will knobies be bad news?
 

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Discussion Starter · #9 ·
Also curious how crabwalk and 4 wheel steering are going to affect longevity of tires and pattern of wear. Will all tires fair equally or will knobies be bad news?
That is a great question, with 4 wheel steer, the alignment setting are likely changed to not get any weird handling on initial turn in which could affect tire wear. We will have to figure that out as the first owners tack on some miles.
 

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Discussion Starter · #13 ·
Very true and something I would imagine has to be done at the dealer. Discount Tire or a shop like that would not have any idea how to proceed with this setup.
Most shops with a 4 wheel computerized alignment machine should be able to do it (GM will publish the specs and settings), but a good alignment is worth paying for, not something to shop for the best price. My Tesla was delivered new out of alignment, steering wheel off center, Tesla sent it out to a local alignment shop..
 

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Wow right out of the gates and not aligned. Kind of interesting they didn't pick that up during the pre delivery inspection. Makes sense and didn't really think about it like that as most alignment machines are similar.
 

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Discussion Starter · #15 ·
Wow right out of the gates and not aligned. Kind of interesting they didn't pick that up during the pre delivery inspection. Makes sense and didn't really think about it like that as most alignment machines are similar.
Tesla does not have a pre delivery inspection... When I got my car Dec 28 2020, it was still warm from manufacturing, literally assembled on 12-26-2020 in the tent. The guy who delivered it to my house and spent a whole 3 1/2 minutes with me before he left said he had 17 more cars to deliver that day, and to just log any defect I found into the phone app, with pictures. I found quite a few, and it took a couple service visits to rectify them. Interestingly I was quite disappointed at the time, but sine the car has been great, and I smile every time I drive it.

Ya, most places have the 4 wheel alignment system, but workmanship plays into a good alignment. There are tolerances, just being within the basic tolerance is not a great job, its trying to get in the center of all the parameters, makes a great alignment. Its like engine balancing, the OEM's get to within 7-10 grams, a good aftermarket balance is about 2 grams, a Nascar Cup, or NHRA Pro Stock engine is 1/10th of a gram tolerance. I worked on this when I was young, we went to such high tolerances, we would have to trick the balancing machine to a different radius to get the ultra precise readings.
 
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