They're made of the highest grade medium carbon alloy steel available

Predisposition for back protection (not included)

0 Front Type: 728 Front Version: Standard Material: Steel

0 tire_pattern: Power 6 tire_stuctor Tubeless_or_tuBette: tl - tubeless

RK CHAIN RK520ZXW BK 120R BL520ZXW-120-CLF piaggio-zip-50-2t-bimodale--bmz1t--50-1997-esi2093384 They're made of the highestDeveloped to Meet the Spec of the Latest Models of Extreme Superbike., Features RK S Only Technology of XW Ring., 2 Lubrication Pools and 3 Contact Lips., Triple Barrier Structure to Further Seal the Lucrication and Prevent The Bris. Chain Available on Today S Market., Highst Tensile Strength of All RK Series and High Rigidity for Instant Respond On Acceleration.