Just got off the phone with timken - doesn't look like any of the big name bearing companies make TT rear wheel bearings. He had me very excited for a moment when he told me that 511010 was still in production and in stock, and then changed it and said they switched over to 511011...
Looks like OEM is the only way to go for now. I wonder what it would take to get a company to put TT versions into production.
