This brand new Stronglight Dural 5083 Inner Chainring is designed for Shimano 9 and 10 speed compact chainsets. It is made from great quality machined 5083 Alloy and features a 5 bolt 110mm fitting. This chainring is compatible with Shimano 9 and 10 speed drivetrains and has 34 teeth. The BCD (Bolt Centre Diameter) is 110mm. Please note the picture used is for illustration purposes, the size you are buying is listed above. It may also be suitable for 8-speed setups.