Yes it was Tiagra hubs. How or where would I buy replacement cartridge bearings for the bontrager? How about buying replacement rear hub for the Tiagra? Could I use a different shimano rear hub since I can't seem to find a tiagra rear hub? How about this hub
http://cgi.ebay.com/NEW-Shimano-105-...QQcmdZViewItem
How dificult is it to replace a hub?