Incredibly smooth, the SID World Cup XX from RockShox is one of the best 29er forks for 2012. With a higher volume than earlier models, its air spring gives a little less progressive ramp-up, though having full travel relies on where the sag is set. Its X-Loc remote makes it quite similar to its predecessor.
Though set with only 80mm of travel, this new fork totally rips downhill, thanks to its properly tuned Dual Air spring. Adding to the smoothness of the fork is the high-frequency damping effect of its carbon fiber crown.
The major new feature of the 2012 RockShox SID World Cup XX 29er Fork is the DNA spring tube, which enhances damping performance and consistency. Weighing in at 1582g for the carbon crowned with 15mm Maxle thru-axle version, the fork is incredibly lighter than its 2009 26″ model.