How to Select Hub/Drum for 7K Lippert Axles on 2018 Grand Design Momentum 349M Toy Hauler

Published 11/07/2017

Question:

What is the right hub trailer assembly or bearing kit for a 7000 lbs axle from Lippert ? My FW is a 2018 Grand Design Momentum 349m. Thank you.

asked by: Erick L

Helpful Expert Reply:

Our range of trailer hub/drum assemblies for 7K axles is shown on the linked page. These all have the 8-on-6-1/2 bolt pattern. You can select a spare hub for your new 2018 Grand Design Momentum 349M 5th wheel toy hauler by confirming which set of bearing is used in your OEM hubs. The new hub has to use the same bearings in order to fit on your spindles.

I checked the specs for the 349M on the Grand Design website but bearing information is not included. So you'll want to pull one hub to take note of the bearings used. All of the 7K hubs we have use either inner bearing 25580 or 28580 and either outer bearing 14125A or 25580. Also note your hubs' wheel stud diameter; three diameters are offered on our 7K hubs.

The linked photo shows the typical appearance of bearing part numbers. We also offer individual bearings and bearings kits. All hubs include bearings.

expert reply by: Adam R