Tooth size: 34T / 144mm, chain size: standard 1/2" x 1/8", shape: round, compatible with various bicycle cranks with 104mm BCD. Material: Made from high-quality aerospace-grade anodized 7075 T6 aluminum alloy. 4mm thick rigid plate design prevents deformation. Manufacturing process: CNC precision machining with anodized finish for smooth surface, vibrant color, corrosion resistance, and long-lasting durability. Narrow and wide tooth design: The alternating narrow and wide tooth profile increases chain contact area, ensuring secure chain engagement, improved chain retention, extended service life, and reduced friction and noise. Compatibility: Fits most SHIMANO and SRAM cranks with 104mm BCD. Please verify your crank's BCD specification before purchase. Specifications: - Material: 7075 T6 machined aluminum - Finish: CNC precision machined with anodized coating - Color: Blue - Available sizes: 32T, 34T, 36T - Speed compatibility: 9, 10, 11-speed - BCD: 104mm - Weight: 41g (32T), 49g (34T), 59g (36T) - Package includes: 1 x Round bicycle chainring Features: 1. Narrow-wide tooth design enhances chain retention, reduces noise, and extends lifespan. 2. Lightweight and highly durable construction. 3. Easy to install and precisely fits 104mm bolt circle pattern. Installation notes: 1. This chainring has a 104mm bolt circle diameter (BCD). Confirm your crankset's BCD is 104mm before purchasing to ensure compatibility. 2. When installing, ensure proper chain length. Route the chain through the cassette and chainring without derailleur tension, then add four additional links for correct fitment.