Thanks so much, yes that's the one. I'm not with the wheel right now but will send pics tomorrow. The problem is I can't access the bearings to get them out. As the large pulley (under the wheel head) is in the way. I assume this should pull off once the bolt is removed (which it is) . The instructions in the manual say remove the 'main spindle assembly' then replace the bearings. Perhaps this means I need to remove more than just the pulley. No wheel maintenance people our way but I will hunt out a second pair or mechanical eyes on this one!!