The STONE chainring, manufactured in a CNC process with an anodized surface and Aleris 7075-T651 aluminum, is a wear-resistant and effective single-plate bicycle chainring on any terrain and at any time. Whatever the type of terrain, even the most rugged, its chain will stay in place.Its optimized wide/narrow tooth system keeps the chain in place with the least friction and the greatest efficiency.Specifications:Type: Round chainring/Single chainring CNC process precision: 0.03mmBCD: 100Thickness: 4 mmTeeth: 34TColor: BlackWeight: 52 grams (32T) / 58 grams (34T) / 60 grams (36T) / 66 grams (38T) Dimension: 138mm (32T) / 145mm (34T) / 154mm (36T) / 162mm (38T) Hardness: 150HB Material: Aluminum 7075-T651 from Aleris USA Process: CNC, Anodized surface Design: Designed to adjust the force angle in 3 angles. Suitable for: Shimano M7100 M7120 M7130 M8100 M8120 M8130 (Not compatible with M5100 and M6100) Speeds: 9 /10/11/12 speeds compatible with the Shimano and Sram 12-speed system Includes pack of 8 screws
