Feature: 1. Manufacturing Material: Full aluminum alloy forging, surface anodic oxidation, can effectively protect the aluminum alloy body, prevent surface rust and oxidation. 2. Safer Riding: Strong impact resistance, uniform force, make riding smoother and safer. 3. Tooth Locating Slot Design: High accuracy positive and negative tooth locating slot, strong bite force and arc cutting angle. 4. Tooth Shape Design: Positive and negative wide and narrow tooth shape design, can effectively reduce the wear of the chain, reduce vehicle load, riding can not drop the chain, efficient rotation, unhindered and powerful operation. 5. Mud Discharge Port: Unique mud discharge port, prevent sediment accumulation, make the tooth unhindered operation. 6. Wide Applicability: Direct mounted positive and negative tooth disc, suitable for GXP crank, 8‑11 speed chain, direct mounted crank, and for DUB crank. Specification: .Item Type: Direct Mounted Positive and Negative Tooth Disc Weight: Approx.126g / 4.4oz Material: Aluminum Alloy Process: Integrated Milling, Anodic Oxidation Product Diameter: Approx.176mm / 6.9in Specification: 42T Offset: Approx.3mm / 0.1in Applicability: For GXP Crank, 8, 9, 10, 11 Speed Chain Package List: 1 x Positive And Negative Tooth Disc Note: Direct Mounted Disk Offset Description:1. Mountain crank specifications are three nail specifications, installation mount is universal and crank specifications have no relationship. That is for GXP shaft, BB30 shaft, F30 shaft, for DUB shaft, the shaft is not the same, but the installation mount is the same.2. Direct mounted disk is divided into 0MM, 3MM, 6MM offset, there is no fixed carframe to use a few millimeters offset, the larger the disk offset, the closer it is to frame, the offset is to correct the chain line, and has to do with the choice of crank frame.3. Frame design has the number of teeth limit, can not be infinite amplification of the number of teeth, such as the use of 6MM offset plate carframe, you can consider the use of 3MM offset plate, but the chain line to rely on the outside (relatively far from the carframe).4. In the cost of the disc, the cost of 0MM offset is lower, the processing difficulty is low. Regardless of the chain line, the 0MM offset disk is more cost effective.5. Choose plates with offset. Chain slant When large and small flywheels are the same, using a direct mounted disc with a low offset may cause the chain to change gears to large flywheels too slant the disc in this case won't drop chain but disc wear will accelerate, chain the greater the slope chain noise is also relatively increase.