2027 Specialized Sirrus X 2.0 Km Bike Gloss Metallic Obsidian / Burnt Gold Metallic Frost Reflective M MPFN-SP21-SP764316-BK } Replaces the existing chainring

} Replaces the existing chainring and spider on 3-bolt BB30 cranks or SuperBoost chainline

}Sun Ringle STR Tubeless Valve 35mm Brass Pair

and higher power output comes from our ergonomically designed

Includes band to keep excess strap out of the way

2027 Specialized Sirrus X 2.0 Km Bike Gloss Metallic Obsidian / Burnt Gold Metallic Frost Reflective M MPFN-SP21-SP764316-BK } Replaces the existing chainringOffering an unprecedented combination of comfort, efficiency, and nimble handling, the Sirrus X excels on pavement, dirt, and any terrain in between. SMOOTH, COMFORTABLE, AND EFFICIENT: Sirrus X provides the smoothest ride in its class. With bigger, confidence inspiring tires, a slightly more upright riding position, and a super intuitive one by drivetrain. RIDER FIRST ENGINEERED: Like all Specialized performance bikes, the geometry of each frame is