Minimum rear camber with factory arms?

[Entropy]

If I were to have a shop set rear camber to its minimum position by adjusting the factory alignment bolts, where would it end up?

[ard]

why? You want more wallowing at speed?





Long but good alignment thread: https://www.bimmerfest.com/forums/sh...d.php?t=668729




But to the Q... are you asking "if I set the physical adjustment to the minimum, what number will that be?"...the answer is easy: "impossible to know, factory tolerance stack up and wear make this an unknowable number"


practically speaking I wouldn't go any less that the lower BMW spec.



Finally if you are battling inner edge wear, your issue is toe. my link explains why

[wsmeyer]

I set mine at 0 camber in the rear to prolong a set of tires that were far worse than I realized. I could sense a slight difference but all in all it drove just fine. I doubt most would even be able to tell the difference.

[ard]

Originally Posted by wsmeyer

I set mine at 0 camber in the rear to prolong a set of tires that were far worse than I realized. I could sense a slight difference but all in all it drove just fine. I doubt most would even be able to tell the difference.

Recognize that toe is a far larger contributor to tire wear than camber.....

[wsmeyer]

Originally Posted by ard

Recognize that toe is a far larger contributor to tire wear than camber.....

Not sure where you got that from but it is flat wrong for rear tires. Front tires have caster and the more caster in the geometry the more negative toe will wear the inside of the front tires but for the rears it's just camber.

[josiahg52]

Originally Posted by wsmeyer

Not sure where you got that from but it is flat wrong for rear tires. Front tires have caster and the more caster in the geometry the more negative toe will wear the inside of the front tires but for the rears it's just camber.

What?

A large amount of toe will always be working the tire and is the major contributor to tire wear. Conversely, caster has almost zero affect on tire wear except it can increase camber gain which may increase tire wear depending on suspension travel, initial camber, steering angle, etc.

You could leave caster alone since it's not adjustable, run even up to a couple of degrees of negative camber all around if you like and if you run minimum toe-in, you should be able to get 30 or 40k miles on a set of Michelin Sport tires.

That's my experience anyway through two cars and four sets of tires. Seems to be working on my X5 also.

[wsmeyer]

Originally Posted by josiahg52

What?

What what lol

[josiahg52]

Originally Posted by wsmeyer

What what lol

I edited my post while you were replying.

What you said makes no sense. Toe is a far larger contributor to tire wear than camber. Unless you're into stanced cars maybe. Caster does nothing to tire wear in and of itself. There's nothing wrong with trying a minumium amount of camber; just don't dismiss toe as a major contributor.

[ard]

Originally Posted by wsmeyer

Not sure where you got that from but it is flat wrong for rear tires. Front tires have caster and the more caster in the geometry the more negative toe will wear the inside of the front tires but for the rears it's just camber.

Lol

Believe what you want, but 'more toe' on any tire no matter where it is located WILL lead to accelerated wear. Period. Whether that wear is inside, outside, etc, will be caused by the OTHER aspects of the alignment/geometry.

A rear tire with 0.01 toe in AND mid-camber will wear LESS than a rear tire at 0.00 camber and (BMWs middle toe) of 0.08

This is based on many many members experiences following my recommendations. Posted in my sig over on BF.

[wsmeyer]

Originally Posted by ard

Lol

Believe what you want, but 'more toe' on any tire no matter where it is located WILL lead to accelerated wear. Period. Whether that wear is inside, outside, etc, will be caused by the OTHER aspects of the alignment/geometry.

A rear tire with 0.01 toe in AND mid-camber will wear LESS than a rear tire at 0.00 camber and (BMWs middle toe) of 0.08

This is based on many many members experiences following my recommendations. Posted in my sig over on BF.

I never said that "more toe" wouldn't lead to more wear. Toe causes wear, that's a fact.

You stated: "Recognize that toe is a far larger contributor to tire wear than camber....."

A blanket statement like that is FACTUALLY NOT TRUE

Both you and josiahg52 are basing your statements on observations which is anecdotal at best.

I'm stating how toe, camber, and caster on there own, or together, effect tire wear based on the GEOMETRY of the suspension components.

The fact that either of you are arguing with me just demonstrates you don't fully understand it all.