RockShox SID Ultimate Race Day Suspension Fork - 29 120 mm 15 x 110 mm 44. The item "RockShox SID Ultimate Race Day Suspension Fork 29 120 mm 15 x 110 mm 44" is in sale since Wednesday, March 31, 2021. This item is in the category "Sporting Goods\Cycling\Bicycle Components & Parts\Forks". The seller is "planetcyclery" and is located in Broomfield, Colorado. This item can be shipped worldwide.