1、Diverse Features: Bicycle positive and negative tooth disc, lightweight full aluminum alloy forging, surface anodized, high accuracy positive and negative tooth positioning, strong impact resistance, good rust prevention effect. 2、Strong Bite Force: Positive and negative tooth positioning groove has strong bite force, arc cutting angle, positive and negative wide and narrow tooth shape design, reduce chain wear, chain and tooth closely fit, not easy to drop the chain, efficient operation. 3、Mud Discharge Bevel Connection: Mud discharge bevel connection, can effectively prevent sediment accumulation, make the transmission and operation more unhindered. 4、High Compatibility: Standard 4 hole BCD 104mm / 4.1in mounting specifications, high compatibility, suitable for a variety of 4 claws mountain bike cranks. 5、Manufacturing Material: Made of high quality aluminum alloy material, it is strong and durable, which undoubtedly extends its service life. Item Type: 34T Mountain Bike Chain Wheel Weight: Approx.70g / 2.5oz Material: Aluminum Alloy Product Size: Outer Diameter: Approx.144mm / 5.7in Adjacent Hole Center Distance: Approx.74mm / 2.9in Opposite Hole Center Distance BCD: Approx.104mm / 4.1in Inner Circle Diameter: Approx.88mm / 3.5in Installation Inner Hole Diameter: 10mm / 0.4in Thickness: Approx.4mm / 0.2inTeeth: 34T 1 x Bike Chain Wheel