the record 9v chain guarantees the transmission of power and protects against any risk in terms of adhesion to the delicate closure point. it offers silence and fluidity to each ride thanks to the perfect development of the profile of the links. the hd-link links lock system provides a high degree of capacity of close links and a greater durability and safety. with links of special steel of 5.9 mm which prolong the service life of the chain and reduce the chainring / sprocket wear. they have been treated with a process of anti-friction ni-ptfe, which reduces friction and makes pedalling is smooth, quiet and efficient. features: -special steel chain. -9-speed. -width of 5.9 mm. -114 links. -ni-ptfe finish. -hd-link chain link lock system. -weight: 2.63 gr/link. -full weight: 300 gr. aprox.