The Racera Mountain Lion 7 are our all weather hybrid 7 ball ceramic skate bearings that are made with G5 (highest rating able to be produced) hardened high precision silicon nitride (Si3N4) balls encased in nylon cages. Silicon nitride is the hardest ceramic compound used in ceramic bearings. Our silicon nitride balls are sourced from a premium Japanese manufacturer. The material is used by NASA inside their space shuttle engines. The races are stainless steel 440C that has undergone heat treating to make it both durable and hardened. Fitted with grey rubber shields as standard on the outside, which are easily removed and replaced when you wish to clean and relubricate your bearings. Optional coloured shields can be fitted in black, blue, green, orange, pink, purple, red, white or yellow. Each bearing is individually tested by Racera before being offered for sale.
These bearings are ideal for speed, outdoors, wet areas and general skating and should be kept clean and lubricated with a light oil for the best performance. These bearings will never rust because the races are stainless steel and the balls are ceramic. Neither of the these materials can rust.
Racera Mountain Lion 7 are sized to fit 7mm axles and are $170 with grey shields.
