Rockshox Spare Fork Spring Air Top Cap 35mm (.5mm Thread Pitch) Boost™ 15X110 (I
Title: Rockshox Spare Fork Spring Air Top Cap 35mm (.5mm Thread Pitch) Boost™ 15X110 (Includes Splined Top Cap & Valve Cover) Lyrik A1+/Yari A1+/Pike B1+/Revelation A1+(35mm)/Boxxer 35mm/Sid35mm Black.