Features: High Execution Planumberebog: Clip fit cycle chainring set features a 34T single speed plan with three screw directly attach structure, ensuring stable and smooth rotation with 10 tooth furrows and T25 screws for secure appendage. Premium Materialsecond: Produced from excellent aluminum alloy and search engine steel, this set proposals better hardness, durability Accuracy Engineehoadministrator: Utilizing cutting and anodizing processes, the chainring is thin yet strong, with a empty 24mm rod and bolted drill for precise and secure installation. Strengthened Agreement: Developed with a 47.1mm widened handle and .37×24T standard English thread, it accommodates most 68/73mm bottom bracket skeletons and is consistent 9/10/11/12 speed arrangements. Permanent and Elegant: Available in black, rose, grape, and blue, collection combines aesthetic appeal with functional durability. Specifications: Product namemail: handle + central rod + tooth disc M13 Substancemail: Aluminum alloy + chromiumoxide steel + presentation + steel Colorebog: Black/Red//Blue Compatiblemail: 9/10/11/12 speed Processecond: cutting, anodizing hardening care, permanent and against oxidation Package Includes: (Set of ) Mountain positive and teeth single speed 34T tooth plate note: 1.: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure do not mind before bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!