Hope Spiderless Retainer Ring Boost ChainringDesigned to complement a Hope chainset, the Spiderless Retainer Ring Boost Chainring is the perfect direct-mount addition to your ride. Created with mountain bikes (MTB) in mind, it is suitable for a variety of chainring sizes and gives you the choice to keep a chain even when you don’t have a chain device or separate slider. Made from hard-wearing CNC machined aluminium, it also includes a hard-anodised finish for long-lasting quality you can count on. Features:Use: Mountain Bike (MTB)Material: CNC machined 7075-T6 aluminium provides the perfect blend of lightweight and strengthSpeed: 11 SpeedCompatible With: 9 speed, 10speed and 11speed set-ups, not suitable for use with Shimano 12 speed quick links Weight: 26T-49g; 28T-56g; 30T-61g; 32T-64g; 34T-72g; 36T-80gBuy Hope Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.