Max bearings are designed without retainers and 40 more balls than standard abec 3 or 5 bearings this enables them to carry a much higher load and makes them perfect for frame pivots they are also packed with crc marine grease which will not wash out or break down when wet ensuring your frame bearings last even longer bearing code 6903 dimensions 17mm x 30mm x 7mm abec 3 grade 10 seals llu grease crc marine application frame pivots weight 1759g