Box two prime 9 speed nickel chainengineered for fast and fun mtb riding, this 9 speed chain offers superb speed and powerful torque on your mountain bike. It features a nickel plated finish, which adds both corrosion and wear resistance to its rock solid hardened alloy steel construction. All prime 9 chains have chamfered shifting edges, solid plates and solid pins to safeguard durability. Box's unique inner link spacing is engineered to grab those modern wide narrow chainrings. Box also chose to modernise the 9 speed platform due to the chain's spirited reputation.faqis the box two prime 9 chain compatible with other 9 speed drivetrains? Yes, all box prime 9 chains have standard external geometry that will work with most existing 9 speed drivetrains.is the box two prime 9 chain compatible with any wide narrow chainring? No, box prime 9 chains are compatible with most 11 speed wide narrow chainrings but there are some chainrings that can result in poor performance. We recommend the following 11 speed wide narrow chainrings for best performance, wolftooth components, raceface, one up components, absolute black.how should i clean my box two prime 9 chain? We suggest removing the chain from the bike and using a soft bristle brush or rag with soapy water or a mild de greaser. We do not recommend pressure washing, strong solvents or de greasers as they could degrade the surface coating.features material hardened alloy steel with nickel finish box's most durable chain nickel plated protection durable hardened solid pins wide narrow chainring compatible prime 9 technology compatibility box one prime 9 11 50t cassette black box two prime 9 11 50t cassette black box three prime 9 cassette black box one prime 9 rear derailleur box two prime 9 x wide rear derailleur black box three prime 9 x wide rear derailleur black box one prime 9 shifter black box two prime 9 shifter black box three prime 9 shifter black weight 350gbuy box components from chain reaction cycles, the world's largest online bike store.