| ductman |
i am thinking about doing my own tire rotations, would it make a difference to just rotate the tires from front to rear and not criscross
since it is easier to use two floor jacks on one side at a time,
one jack forthe front and one for the rear? any thoughts |
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| Bimerman |
| My other car is BMW 325XI (all wheel drive). It is stated everywhere that you should not have to roate AWD car tires. Why is it not the same with MDX?:confused: |
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| G. COLTON |
Way back in antiquity front to back was the way radials were totated. Bias ply tires were then crossed rotated. At some point, I do not remember when, the recommendation was changed and radials were totated the same as bias ply.
Draw yourself a picture of the axial rotation of a tire and you will see why cross rotation is better.
Bimerman says "It is stated everywhere that you should not have to roate AWD car tires. " Just where is this 'everywhere?" I have read some parts of "everywhere" and it is not so stated there. Why do you think an All Wheel Drive (AWD) vehicle would not require rotation? Do you think that there cannot be uneven wear on an AWD drive vehicle?
G |
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| Bimerman |
quote:
Originally posted by G. COLTON
Just where is this 'everywhere?" I have read some parts of "everywhere" and it is not so stated there. Why do you think an All Wheel Drive (AWD) vehicle would not require rotation? Do you think that there cannot be uneven wear on an AWD drive vehicle?
G
I have asked BMW dealers, and went to BMW forums. BMW recommends NOT rotating the tires. The main reason is that in AWD cars when a tire is broken in it becomes suited to the position on the car it is in. When you rotate the tires you upset the balance of the car until the tire new to that position breaks into the new position thereby losing some handling characteristics. The other reason is that with directional tires and a staggered setup, most performance cars will have this, you simply cannot.
Again, I don't know if this only apply to BMW which I think would be odd. I have my BMW for almost 4 years and I don't rotate the tires. Thus far, they are worn out evenly. |
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| G. COLTON |
quote:
Originally posted by Bimerman
I have asked BMW dealers, and went to BMW forums. BMW recommends NOT rotating the tires. The main reason is that in AWD cars when a tire is broken in it becomes suited to the position on the car it is in. When you rotate the tires you upset the balance of the car until the tire new to that position breaks into the new position thereby losing some handling characteristics. The other reason is that with directional tires and a staggered setup, most performance cars will have this, you simply cannot.
Again, I don't know if this only apply to BMW which I think would be odd. I have my BMW for almost 4 years and I don't rotate the tires. Thus far, they are worn out evenly.
That was the reason that they gave for not doing a cross rotation 40 years ago. Guess BMW has reverted back to that world.
G |
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| Bimerman |
| Or, perhaps it applies to performance cars only?:8: |
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| JL_SS |
quote:
Originally posted by Bimerman
Or, perhaps it applies to performance cars only?:8:
Is your 325xi AWD all the time? Most AWD vehicles are actually FWD most of the time. Thus you will wear the front tires out faster in most AWD vehicles. |
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| andreseng |
quote:
Originally posted by G. COLTON
Way back in antiquity front to back was the way radials were totated. Bias ply tires were then crossed rotated. At some point, I do not remember when, the recommendation was changed and radials were totated the same as bias ply. G
Hey G-
So back in antiquity they Totated. Then bias plys came along and you Rotated. Then at some point everyone went back to Totation.
And to think.....I've been Rotating all these years.....:2:
Nothing like a fat finger (G- I think they call them Phat fingers now) to bring a little humor to the situation! |
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| Bimerman |
quote:
Originally posted by JL_SS
Is your 325xi AWD all the time? Most AWD vehicles are actually FWD most of the time. Thus you will wear the front tires out faster in most AWD vehicles.
Yes, It is AWD all the time. All tires wears out evenly.:4: |
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| mdxx3 |
quote:
Originally posted by JL_SS
Is your 325xi AWD all the time? Most AWD vehicles are actually FWD most of the time. Thus you will wear the front tires out faster in most AWD vehicles.
I believe the Bimmer AWD is rear wheel drive bias (a Bimmer tradition to do RWD whenever possible). Some Infiniti AWD system is this way too (rear bias). |
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| Bimerman |
quote:
Originally posted by mdxx3
I believe the Bimmer AWD is rear wheel drive bias (a Bimmer tradition to do RWD whenever possible). Some Infiniti AWD system is this way too (rear bias).
Even if it is rear wheel bias, I would see that the rear tires wears out quicker than the fronts. But, I don't. They all wear evenly. |
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| JL_SS |
quote:
Originally posted by Bimerman
Even if it is rear wheel bias, I would see that the rear tires wears out quicker than the fronts. But, I don't. They all wears evenly.
I believe the xdrive system does have a rear bias in dry weather but in all the conditions that you would see the tires wear differently (cornering, accelerating, etc) the xdrive system is kicking in and distributing the power between the tires more evenly. |
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| pianoman41 |
quote:
Originally posted by Bimerman
Yes, It is AWD all the time. All tires wears out evenly.:4:
Do you have directional all-seasons? This would also be a reason for not cross-rotating. |
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| Bimerman |
quote:
Originally posted by pianoman41
Do you have directional all-seasons? This would also be a reason for not cross-rotating.
They are all-seasons tires, but I don't think they are directional. I will check and let you know. |
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| Bimerman |
| As I suspect, they are non-directional all season tires. |
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