104/64Pcd Chinook 4 Arm 10/11X Chainrings

The quality of gear shifting is very high, thanks to ramps added on the outer chainring. CNC machined chainrings compatible with 10 or 11 speed MTB. * Material: 7075 T6 aluminium * Inner/Middle/Outer: 64pcd/104pcd/18/23mm wide arm * Weight: 65g (Outer 42t) **Please note** there are two widths of arm available 18mm and 23mm. This is measured where the arm of the chainring meets the arm of the spider, just below the bolt holes.