From toeing the line at the local XC circuit to all-day downcountry epic, the RockShox SID Ultimate Race Day 29in OneLoc Boost Fork has our front suspension needs covered. RockShox chose 35mm stanchions for the perfect balance of stiffness and weight to handle the demands of modern cross-country bikes. 120mm of responsive travel and a 44mm offset built around 29-inch wheels give this fork incredible handling as we bob and weave through technical rock gardens, while an XC-tuned DebonAir air spring rides higher in the travel for confidence-inspiring control. The ultralight Charger Race Day Damper gives us just enough adjustment to handle varying conditions and is combined with the OneLoc remote creating a rock-solid lockout for ultra-efficient climbing.