No need to replace the entire hub if all you were after was the "zerk fitting"(Bearing Buddies, EZ-Lube).Hello,
I think we've been sharing some trailer setup advice in this mega-thread. I recently went to repack my hubs since my trailer may be joining us on an upcoming 1800-mile road trip. Rather than repacking, I discovered some hubs that feature a zerk fitting which flushes grease through the bearings and out the front of the hub (sort of like a Dexter axle). Purchasing them was overkill for my current needs since they're pre-packed, but the fittings will come in handy when it's time to "repack" next year.
Here are the exact hubs I purchased: https://www.northerntool.com/shop/tools/product_200466891_200466891
Before putting the Tiguan centercap in place...
I have more photos and a write-up at https://stealthgti.com/2017/10/23/ultra-tow-trailer-hubs/. The swap was super-easy.
Scott
Bearing Buddies $24.86 - https://www.amazon.com/gp/product/B000Y89L0S/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Generic version - $10.83 - https://www.amazon.com/Reese-Towpow...id=1508854402&sr=1-1&keywords=bearing+buddies