I think some of those people must live in alternate universe or they are lying!! Never seen the slightest sign of a crack, even with thousands of km of lowered tyre pressure on the roughest of roads towing 2.2t. To crack sidewalls, even on a Cooper, you must be running seriously low tyre pressures at high speed on bitumen. To do it in two different sets of tyres means that they are doing something seriously wrong. Either that, or the tyres are very old, which isn't the case with K02's.
I have found no problem in the wet compared with other tyres, excellent grip on gravel and rough roads, excellent ride on 18 inch wheels, a bit of noise as the tyres wear, particularly after my wheel alignment went out on extreme corrugations and wore and scalloped the insides of the half worn tyres. No other issues and fantastic on rough rocky roads.

