MTRX bearings are filled with SKF Solid Oil technology. This means an oil-saturated polymer matrix is moulded into the free space of the bearing, forming very narrow gaps around the rolling elements and raceways, enabling the bearing to rotate freely and the oil to be released during operation.
MTRX bearings provide many advantages due to Solid Oil, especially if bearings are mounted at dirt-exposed positions in the bike. The polymer matrix contains two to four times more oil than bearings with conventional grease fill, and so protects the bearing components, leading to longer bearing life, even under extremely contaminated conditions, while requiring no relubrication.
The polymer filling physically supports integral seals, reinforcing their effectiveness while the bike is undergoing high-pressure cleaning. MTRX bearings prevent lubricant washout and ingress of contaminants more reliably than grease-filled bearings.