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Tyres all terain AT or mud terain MT

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muddyweb:
The reason being that radials provide better braking effort.  Putting them on the front would over-bias the braking to the front end making the vehicle highly unstable.

The same applies for putting them across an axle.

Paul:
It's not only braking the law, It's an MOT failure too,

Taken from my testers manual:

b. a 3- or 4-wheeld vehicle fitted with single wheels, and

i. a cross-ply tyre or bias-belted tyre fitted on rear axle and
radial-ply tyre is fitted on front axle, or

ii. a cross-ply tyre fitted on rear axle and a bias-belted tyre
fitted on front axle.

Range Rover Blues:

--- Quote from: "muddyweb" ---The reason being that radials provide better braking effort.  Putting them on the front would over-bias the braking to the front end making the vehicle highly unstable.

The same applies for putting them across an axle.
--- End quote ---


It's not the braking effort as much as the handling, because cross plies tend to retain their shape rather than conform to the surface of the road they do not grip as well in corners as radials which do conform to the contour of the road.  Although this is less of an issue with beam axles like ours the law is there to protect us.  Basically if you get it wrong the back of the car will overtake you in a corner and you'll have a crash (if I remember the advert your Austin 1300 will hit a 'phone box and turn over, only John Clease would be happy about that).
Rather like the arguament about remoulds, it is LESS important on a series because of the speeds involved but if you are unsure get the opinion of a reputable garage, MOT tester or tyre specialistbefore mixing cross plies and radials.  My advice is don't mix them at all!

muddyweb:

--- Quote from: "Range Rover Blues" ---It's not the braking effort as much as the handling, because cross plies tend to retain their shape rather than conform to the surface of the road they do not grip as well
--- End quote ---


The same applies under braking, where arguably you have less chance of controlling the vehicle and less time to correct it.

muddyjames:
thank you everyone for your help. I have now got cross ply all round and lovely tread on the front wheels now rather than the nearly slik tyres i had. bargain at £112 for 2 at tyres fitted etc. just need to test them out on saturday now.

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