Box Four 8 Speed Polished ChainIdeal for mountain bike riding, this 8 speed chain gives you fantastic torque strength and speed on every MTB ride. This model employs an 8 speed platform in a similar strategy to the Prime 9 model but at a great value price point. It features a polished construction that is then chemically treated to achieve corrosion resistance. Box has also engineered the inner link spacing to be a little tighter than other 8 speed chains as well as optimising it for use with the Box Four Wide/Narrow Chainring.FAQIs the Box Four Prime 9 Chain compatible with other 8 speed drivetrains? Yes, The Box Four Prime 9 chain has standard external geometry that will work with most existing 8 speed drivetrains.Is the Box Four Prime 9 Chain Compatible with any wide narrow chainring? No, we make a Wide/Narrow Chainring specific for use with Box Four 8 Speed drivetrains.How should I clean my Box Four 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 degreaser. We do not recommend pressure washing, strong solvents or de-greasers as they could degrade the surface coating.Features: Material: Hardened Alloy Steel Use: MTB Speed: 8 speed Durable Hardened Solid Pins Wide/Narrow 8 speed Specific Compatibility: Box Four 8 Speed Shifter Black Box Four 8 Speed Wide Rear Derailleur Black Box Four 8 Speed 11-42T Cassette Black Box Four 8 speed Wide/Narrow Chainring 104BCD 32T Black Weight: 364gBuy Box Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.