The Team Associated Octalock 48P Spur Gear, launched with the RC10B74.1 buggy, introduces the latest spur gear design from Team Associated. In addition to the octagon shape, each pad has eight locking tabs that engage with the spur gear for maximum security and longevity.Note: Octalock spur gears are 100% backwards compatible to older models including (but not limited to): RC10B6.2, RC10B6.2D, RC10T6.1, RC10SC6.1, RC10B74, RC10B6 series, RC10B64 series, RC10B5 series, and RC10B4 series.