MRBILLYUK said:
Always have the best tread on the back , if you have to slam on ( especially in the wet , or on a bend ) , the front will stop the back won't , it will want to overtake the front end .
Tyres play a major part in the braking of a car and the fronts do most of the braking .
MrBillyUK !
You just cancelled yourself out?
You want the best tyres on the back...but it's the front that do most (>90%) of the braking.
A car with a sprightly rear end, one that weaves about under braking, is not suddenly going to become rock solid because you've an extra 3mm of tread on the rear tyres...is it?
Also, you say about the back coming round when hard on the brakes...
At rest a 172/182 etc. have F65%/R35% weight distribution, so that's about 700kgs over the front, 400kgs over the rear.
When braking hard what does this then become? I reckon around F80%/R20% if not F85%/R15% as the weight shifts forwards.
So you've got no more than approx. 150-200kgs pushing the back down...that's why it moves about, there's nothing pushing it down, and a few extra mm of tread doesn't make a whole lot of difference.