Mike,

road wheel bearings are 40mm x 110mm x 27mm which are 6408 FAG or SKF, etc. The inner track adjusting bearing is the same. The outer track adjusting bearing is 50mm x 110mm x 27mm which is a 6310. You can order these bearings with contact seals by adding 2RS to the bearing number, then pop out the inner side seal to allow grease to get to the rolling elements by normal lubrication means. Hope this helps.

Perry