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Different tread patterns on same vehicle?

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thermidorthelobster:
The 101 currently has 8 bar-grip type tyres, size 10-10.5x20.  They're different brands, but the best ones of the bunch are Dunlop Spezial Mils.

Dunlop don't make Spezial any longer, and so far I can't find anybody who can get me a similar tyre in that size.  I can, however, buy a different tread pattern (similar to an All Terrain type) in that size.

The crunch is, if I have to replace all 8, it's going to be costly, plus I'll be throwing away 2 good and 6 reasonable tyres.  The next option has to be buying 2 of the AT-type tread pattern, but this means I'll have different treads on the front 2 than the back 4, and if I have to swap spares around, I could end up with different tread patterns on the same axle.

I'm not too happy about doing this, but if I were to, does anybody know whether that would be illegal or an MOT failure?  I understand that in this size, the manufacturers make the tyres to a good tolerance, so the sizes wouldn't be that different even across manufacturers.

TimM:
Your not allowed to mix cross ply and radials on the same axel, but I don't think there is any requirement for them to have the same pattern (but don't quote me on that).

This months LRO has a buying guide in there for 101's, and it talks about what tyres are available, it might be worth you getting a copy (unless you have one) or having a read in WHSmiths  :wink:

Henry Webster:
I'd be a little concerned that the rolling radius was different.  If you look at most big off road tyres they very hugely across brands even for the same nominal size.

H

hobbit:

--- Quote from: "Henry Webster" ---I'd be a little concerned that the rolling radius was different.  If you look at most big off road tyres they very hugely across brands even for the same nominal size.

H
--- End quote ---


Agreed if the rolling radius are the same, no probs, if its a permanent 4wd (or 6wd) then the rolling radius will have to be the same, if as i think that one of yours is rwd only in normal use, as long as the 4 are the size no probs

Just if that is the only 4 you have and the others are different radius, changing one would me at least a pair for the sake of the drive axle

Henry Webster:
101s are permanent 4x4 as std, so I would guess it is at least permanent 6x4

H

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