RockShox Reba RLT - Solo Air 100 mm, (9 - mm QR, (1-1/8, 29 - Inch), Crown Adjust, Black) Motion Control DNA damping mechanism is lighter than its predecessors while still offering smoother, more consistent damping performance 100mm of Solo Air travel uses a single Schrader air valve to simultaneously fill both positive and negative air chambers, simplifying suspension setup and retaining the lightweight and plush ride of Dual Air Adjustment: External rebound / low speed compression / external floodgate and lockout / spring via air pressure Power Bulge technology reinforces the lower leg at the bushing, increasing stiffness and bushing durability 1584g