You don't "need". If you corner at the same speeds as you would on road legal tyres, all will be fine. But if you want to exploit the slicks, yes there is the possibility of breaking the spot welds.tertius said:Because you need a full cage and seriously beefed up suspension to run slicks. But yes, that would indeed become a possibility.
BTW if you do your European jaunts with Bookatrack they bring a fully equipped tyre truck should you muller your tyres, or will transport spare sets of wheels for you (for $$$ of course).