SID XX World Cup SID's Superlight Integrated Design structure plus 15mm Maxle Lite and the BlackBox carbon crown steerer create a chassis with all the stiffness you need at the weight you want. The most famous fork in cross-country racing is now available for the 29-inch rider. With the 15mm Maxle Lite and, of course, the BlackBox carbon crown steerer, SID 29 offers all the stiffness you need at the weight you want. At 1572 grams (World Cup XX with 15mm Maxle Lite) the SID 29 World Cup is the complete race package that could be considered an unfair advantage.