Pair of snow chains ok, pair of winter tyres not?
Pair of snow chains ok, pair of winter tyres not?
Author
Discussion

HertsBiker

Original Poster:

6,443 posts

301 months

Saturday 16th November 2013
quotequote all
I am a fan of winter tyres, there, admitted it.

Am trying to work out why every vendor is happy to sell me a pair of chains for the drive axle, yet the tyre bods only want to sell me a set of four?

Provided the speed is kept down, surely two of either is okay?

HertsBiker

Original Poster:

6,443 posts

301 months

Saturday 16th November 2013
quotequote all
I am a fan of winter tyres, there, admitted it.

Am trying to work out why every vendor is happy to sell me a pair of chains for the drive axle, yet the tyre bods only want to sell me a set of four?

Provided the speed is kept down, surely two of either is okay?

Patrick Bateman

13,202 posts

204 months

Saturday 16th November 2013
quotequote all
Snow chains don't stay on when the snow disappears, tyres do.

jamieduff1981

8,092 posts

170 months

Saturday 16th November 2013
quotequote all
I think because winter tyres are to be driven on all winter at proper speeds, whereas snow chains are only to be used to claw your way through actual snow at very low speeds, whereupon they are to be removed again once you reach tarmac.

Winter tyres should maintain the car's handling balance and braking distribution. Snow chains have a single use and can't be fitted for normal driving around.

Finlandia

7,818 posts

261 months

Saturday 16th November 2013
quotequote all
As said above, chains are used for low speeds (I believe they are restricted to 20 or 30mph) for short distances, while winter tyres are used at normal speeds all winter.
Imagine slicks on the front and regular tyres on the rear in the wet, the steering won't be anywhere near what it should be, and swapping them around will cause you spinning, this is what would happen with winters and summers mixed.

CraigyMc

18,369 posts

266 months

Saturday 16th November 2013
quotequote all
HertsBiker said:
I am a fan of winter tyres, there, admitted it.

Am trying to work out why every vendor is happy to sell me a pair of chains for the drive axle, yet the tyre bods only want to sell me a set of four?

Provided the speed is kept down, surely two of either is okay?
They can't ensure the speed will be kept down.

Even at sensible speeds with summers on one end (say, the rear) and winters on the front, the grip balance would make the car want to travel like a dart flying backward under violent conditions (eg. panic stop, or black ice).


blearyeyedboy

6,811 posts

209 months

Saturday 16th November 2013
quotequote all
^ This. Chains are usually only used at very slow speed. At higher speeds, having one axle grip the road less than the other leads to dynamic instability issues. In an FWD car, you risk your car spinning round until it faces backwards on a slightly quicker/cambered corner. In an RWD car you understeer badly. Both are a bad idea.