well my XT came with Trial Wings new. In the dry they are pretty good though you can feel the tread moving a bit when riding in a "spirited" fashion, but in the wet they are truly horrible, they feel skittish and unstable (tried different pressures, no real change), and while they have not let go (the odd sideways skip), I have no feeling of trust in them at all. Changing them soon I think. (I tend to ride mainly in the dry so has not been an issue too often)