Rich_P Posted January 25, 2010 Share Posted January 25, 2010 I know the law states that it's 1.6mm before a tyre must be replaced, while I think the tyre ceases being effective below 3mm. When it comes to Mud Terrain tread patterns, at what stage is the tyre likely to no longer be effective? For instance, is it 5mm? Or is it 8mm? Or do they rapidly become less effective once they've lost their first couple of mm worth of tread? To clarify my situation a little. I have a set of XZL tyres I want to fit. At the moment I've got four worn tyres and two almost brand new. If it's a case that the remaining tread on two of the worn ones is still enough for them to be effective, I'll just fit them to the front and put the new ones on the rear. What I don't want is to waste ££ on getting the tyres changed over on the rims if the worn ones will be useless off the tarmac. Quote Link to comment Share on other sites More sharing options...
rusty_wingnut Posted January 25, 2010 Share Posted January 25, 2010 also how long is a piece of string? Quote Link to comment Share on other sites More sharing options...
Rich_P Posted January 25, 2010 Author Share Posted January 25, 2010 Oh well. If it's any use I've just measured the tyres. The worn examples I'm thinking of putting on the front have 7mm worth of tread remaining in the centre. The tyres I'm wanting to put on the back have about 12mm, possibly a little more. They're all XZL. Quote Link to comment Share on other sites More sharing options...
BogMonster Posted January 25, 2010 Share Posted January 25, 2010 It gets progressively less capable as the tread wears, the other thing is that as many (most?) MTs have tapered tread blocks the gap between the lugs at the contact patch actually decreases as the tyre wears, making it "less aggressive". Personally I reckon by the time most MTs are half-worn it is time to sell them to some mug and get some new ones. That equates to about 8mm on a set of BFGs. Anything much less than that and you are sliding around all over the place and as for the legal limit, forget it! String: |--------------------------------------------------------------------| that long Quote Link to comment Share on other sites More sharing options...
Adam001 Posted January 25, 2010 Share Posted January 25, 2010 also how long is a piece of string? Twice the distance from the end to the centre Quote Link to comment Share on other sites More sharing options...
landrover598 Posted January 25, 2010 Share Posted January 25, 2010 I change my off road tyres at about 8mm Quote Link to comment Share on other sites More sharing options...
Rich_P Posted January 25, 2010 Author Share Posted January 25, 2010 Okay then. Has anyone got a pair of XZLs going cheap? Quote Link to comment Share on other sites More sharing options...
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