Bert engineering has been working with tiger rear ends preforming test on ways to minimize power loss throught the drivetrain.One of the least expensive and effective ways to reduce power loss was Berts new low drag seals for the wheel hubs. Now there is no need to replace the seal ever time you grease the bearing . This sealcan be removed and reinstalled with out any damage.
REPLACEMENT O-RINGS NIA151, NIA240