From What I could find out, it looks like your 2021 Arctic Fox 29-5T came with a MORryde RPB King Pin, but I couldn't confirm which specific pin box it is mated to. What you will need to do is contact Northwood directly with your VIN. They will be able to tell you exactly which pin box you have and this is the easiest way to go about finding it.
In the off chance they cannot tell you, there are other ways to verify which one you have. First will be to check your pin box for a label. The... view full answer...
The multitude of bolt patterns and tire sizes used on each trailer prevents us from having a specific for each trailer. If a previous owner or a dealer changed the axles and thus the bolt pattern we wouldn't want to recommend something that wouldn't fit.
To get the right fit for your 2021 Northwood Arctic Fox Grande Ronde Fifth Wheel Trailer you'll need to know the bolt pattern for the wheel and the tire size for the tire to ensure you don't change the ride of your trailer. I've attached... view full answer...