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Tire chains on AWD - a no-no?
No-no it's not a no-no.
Here in NZ AWD vehicles frequently use chains on ski access roads.
This is as much for downhill control as uphill traction.
The comparison to putting a chain on one wheel only in a two wheel
drive car is invalid.
The very good reason for not doing that is the unbalanced side-to-side
traction imbalance resulting in directional instability. This does not
occur when two wheels on the same driven axle are chained.
My A4 manual states (p. 132):
-Snow chains will improve braking ability as well as traction in winter
-Where snow chains are compulsory on certain roads, this also applies
to cars with four-wheel drive.
-The snow chains must only be fitted on the front wheels - this also
applies to cars with four-wheel drive.
> From: "Meron" <email@example.com>
> Date: Tue, 26 Nov 1996 23:22:30 -0800
> Subject: Re: quattro vs. traction control
> On an AWD car it is a no no to put tire chains on only one set of wheels,
> it is almost like putting a chain on one wheel only in a two wheel drive
> car. Audi (I think) advises against using chains.
> Avi Meron
> 86 5Kcstq
Greg Spark '96 A4 1.8Tq
firstname.lastname@example.org MTM 187hp
Hamilton, New Zealand