RockShox Reba RL - Dual Air 120mm 26-Inch 9mm (Black) Motion Control allows fork to chew up climbs with incredible efficiency while the patented lockout blowoff valve and threshold control immediately absorb any bumps along the way 120mm of Dual Air travel, featuring adjustable positive and negative air spring chambers for easy and nuanced suspension tuning 1-1/8" aluminum steerer tube for lighter weight Magnesium lowers with post mounts for disc brakes 1519g. QR Motion Control Aluminum Steerer 1-1/8" Disc