Tooth size: 34T / 144mm, chain size: standard 1/2 X 1/8 , shape: round, suitable for different kinds 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-fading Wide and Narrow Teeth: The narrow and wide tooth shape greatly increases the contact area with the chain so that each of the teeth can be fully inserted into the chain, ensure the ultimate chain retention, increase 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: 7075 T6 machined aluminum Finished: CNC Precision Process Blue color Range: 32T / 34T / 36T Compatibility: 9/10/11 speed Size / BCD: 104BCD Low weight: 41 g (32 t) / 49 g (34 t) / 59 g (36 t) Package content: 1 * bicycle chainring (round) Functionality: 1. New design with narrow and wide teeth increases chain retention, service life and reduces friction and noise 2. Super durable and lightweight 3. Easy to install and fits perfectly to the 104mm screw pattern Installation note: 1. The BCD value of this chainring (bolt circle diameter) is 104mm. Before submitting your purchase, make sure your crank stabilizer vest is 104mm or it wont fit 2. PayAttention to the chain length, usually with the chain through the old single disc and flywheel, under the condition without the dial, section 4 plus chain section for standard.