Large 97 basket in the Swix Triac® Basket System. For Racing and touring. Active skiers. Interchangeable. Gives good support on soft surfaces and wet conditions.TBS is a patented interchangeable basket system, allowing the user to change basket in just a few seconds. The non-glue system makes it very easy for the user to adapt to various snow conditions. Simply unscrew the nut, switch basket, and tighten again.