Schwalbe Tacky Chan Bicycle Tires The Schwalbe Tacky Chan was developed over two years of World Cup racing. Overall winner Amaury Pierron, among others, contributed his experience to the tire. It has 10% more stable shoulder lugs than the Magic Mary and was trimmed with 100% precision. This allows for super aggressive cornering and an extremely late braking point. The open shoulder area provides direct feedback and improves self-cleaning. In addition, the ramps on the center lugs provide optimal rolling characteristics. on average 8% lighter than Magic Mary produced with fair trade rubber optimized for Downhill, Enduro and heavy E-MTB's