2021 RockShox SID Ultimate 120mm 44mm offset Newest model w/ Race Day Damper. 35mm stanchions Top of the line model. The item "2021 RockShox SID Ultimate 120mm Race Day Boost Blue 35mm stanchions" is in sale since Thursday, September 17, 2020.This item is in the category "Sporting Goods\Cycling\Bicycle Components & Parts\Forks". The seller is "southtampabicycles" and is located in Tampa, Florida. This item can be shipped to United States.