[QUOTE="tallbloke"] the >> larger gap between the tread blocks puts even more stress on the >> leading edge. Increasing the front tyre pressure helps apparently. If the tyre is uffering so much deformation under braking at the correct pressure for the weight of the vehicle and the type of surface, it indicates that the tyre carcass isn't up to the job and should be replaced with something better. If a big trailee is doing this to a deep block tyre because it's getting hard road use, then the user should consider using more road orientated tyres or buying some better crash protection.[/QUOTE] Or if, like me, you use your big trailee off road, you just live with it. The worst it does is cause some vibration when it gets really bad - no big deal.