This listing is for a lightly used Trek 2024 Supercaliber Rockshox SIDLuxe IsoStrut with less than 50hrs on it. Conservatively rated at 9.0/10.00 condition. Used, but not abused. Less than 50 hrs on this suspension. Removed only to convert bike to a Flight Attendant system. Retail is $629 for this part, get this one for nearly half that! Item specs can be found on the TrekBikes website by using part # 601842947029. FREE shipping! Thanks for looking!