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 7001 dimensions 12mm x 28mm x 8mm abec 3 grade 10 seals 2rs grease crc marine application frame pivots weight 20g