* Machined from 6061 ÛÒ T6 aluminum with two-stage anodize black and gold finish* Hellbender Neo bearings incorporate SKFÛªs patented MTRX technology ÛÒ an oil-filled, solid polymer matrix that completely fills the free space in the bearing* During use, oil is released from micro-pores in the polymer, continuously lubricating the bearings. * Solid oil matrix eliminates any empty space inside the bearing ÛÒ preventing dirt, mud and water from entering and causing wear and damage* Designed to be ridden in the most extreme conditions without the need to regularly service or lubricate the bearings