Shimano Saint M820 10sp Rear Derailleur New chain control and silencing technologies in the new RD-M820 are a game changer for gravity riding. In addition to the proven Shadow Plus RD design, a Saint specific, high durometer urethane bump stopper (between the RD and the dropout) was added to reduce impact noise.Now 10-speed, the new RD-M820 features a durable super wide link that serves as the backbone of the DH parallelogram. Ready for track and trail, the mode converter easily adapts between two settings for MTB cassette gear ratios (11-32, 11-34, 11-36) and road (11-23, 11-25, 11-28). Features: Direct Mount gives a simpler, cleaner lookDelivers reliable and precise shifting with a stiff and lightweight open design Shadow+ features a super low profile design that reduces the risk of damage from trail side hazards Shadow Plus uses a chain stabilising switch that when on will reduce chain bounce in rough terrain maintaining more stable drive and shifting. This can be switched off to remove the wheelDirect cable routing prevents snagging from any trail side hazardsAll-alloy construction leads to lower weight without compromising strength and durability Four fluorine-coated link pin bushings make this one of the slickest shifting derailleurs on the trails High rigidity wide outer link braces the pulley body to increase pivot joint rigidity resulting in a crisp shiftStrong return spring for a positive shifting feelDurable sealed bearing pulleys25T capacity SS cage10-speed onlyUrethane elastomer bump stop reduces noiseMode converter (DH mode/Freeride mode)Super wide links: Create a rigid structure that resists twisting and improves durabilityIntegrated skid plate: Protects the derailleur in the event of an impactA 2 year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.