The Straitline Silent Guide offers simplicity, silence and ruggedness required for demanding downhill/freeride applications. Using modern materials, this guide is amazingly light and durable. The proprietary urethane sliders are custom formulated to provide maximum wear resistance and minimal friction and almost completely eliminate noise to the point you won"t know you are running a chain device.Shimano Saint M810 or M815 set ups require Saint specific Chainguides/Bashrings CH0067 or CH0068Elastomeric tensioners/sliders keep chain on silentlyNo moving partsIncludes 104 BCD alloy bashringCNC-machined, anodized and laser etched in British Columbia, CanadaItem SpecificationsWeight176gBolt Pattern4-BoltChainring BCD104mmMax Tooth32-36teethChainguide Mount TypeISCG-05Ring SetupSingle