Tooth size: 34T / 144mm, chain size: standard 1/2X 1/8, shape: round, suitable for various types of bicycle cranks with 104mm vest Material: Made of high quality, aerospace grade anodic oxidation 7075 T6 aluminum alloy. 4 mm thick rigid sheet to prevent sagging CNC precision process: precision machining and anodic oxidation electroplating, medals smooth surface, bright color, corrosion resistance and non-fadingWide and narrow teeth: The narrow and wide tooth shape greatly increases the contact surface with the chain so that each of the teeth can be fully inserted into the chain, provides the ultimate chain retention, increases the service life and reduces friction and noise Compatible Model: Fits most SHIMANO and SRAM cranks. Please carefully determine the specifications of your BCD crank before purchasing Product Specifications: Material: Machined 7075 T6 Aluminum Finished: CNC precision process Color blue Range: 32T/34T/36T Compatibility: Speed 9/10/11 Size/BCD: 104BCD Low weight: 41g (32t) / 49g (34t) / 59g (36t) Package Content: 1 * Bike Tray (Round) Feature: 1. New design with narrow and wide teeth increases chain retention, lifespan and reduces friction and noise 2. Super durable and lightweight 3.Easy to install and perfect fit for 104mm screw pattern Installation note: 1. This chainrings BCD value (bolt circle diameter) is 104mm. Before submitting your purchase, please make sure your crank stabilizer vest is 104mm or it will not fit 2. Pay attention to the length of the chain, usually with the chain through the old single disc and flywheel, under the condition without the dial, section 4 section chain plus for the standard.