Reading around the "interweb" it seems that most are sold as maintenance free, but some are built with ball bearings and require lubrication.

Some are fitted with protective covers, others not.

I've no idea what MMC use.... banghead... probably the cheapest they could find.... hide


Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...