Nope - just square footage. The prinsu is significantly longer and goes edge-to-edge. In fact I moved all of my old accessories for the 8020 rails right to the prinsu.
Measure the distance between your roof rails and order to length. There isn’t much else to it! As others have shared here - there are numerous ways to mount to your rails.
Great questions. For my use I’m not sure I would change anything. I’ve had my roof box fully loaded, maxtrax, plywood, etc etc and the cheap fasteners were fine.
If I were to put more weight up there, say an RTT, I would come up with a more substantial attachment to the roof rail channels...
I ordered the eye-nuts from frontrunner - but others have found cheaper / more elongated on mcmaster-carr. The carraige bolts were from my local hardware store.
MaxTrax pins are gigantic in diameter - I had to drill holes. I've since moved to carriage bolts with eye nuts. They slip into the extrusions no problem.
You are right. Gobi claims a 300# safe driving load limit and 800# static.
The owners manual for my 570 and the TLC state to not exceed 154# “on the roof luggage carrier”.
Somebody smarter than me weigh in. My assumption is the load limits are based on the roof and not the rack.
This is untrue. The roof has a maximum static load capacity whether or not you are using OEM rack or aftermarket.
Im not aware of any after market racks that require additional mounting holes to be drilled. Most use the three factory attachment points.
My experience so far:
As someone pointed out earlier, there is a different 8020 profile that is slightly bigger that will more easily accept slide-in Front Runner accessories. The series I use requires a few mm to be shaved off of most carriage bolts / button-head bolts
I drove about 70 miles...