Tubeless easy tubeless easy is schwalbe39s new design to make tubeless tyres work smarter and easier for you super gravity construction super gravity has a new carcass construction at its core the principle is a familiar one in motorbike tyres they have taken the best features and developed them further for the mtb for super gravity the sidewalls are made up of four layers of carcass material but there are only two layers underneath the cap the classic downhill tyre construction has six