If you have a Coleman popup with the channels already on top installed by the factory forget drilling holes in the roof of your trailer Get 8 round top stainless steel bolts nuts and lock washers and grind two sides so that the bolt head slides snugly down the channels. Drill the holes out in the four mounting brackets to fit so the new screws will go through. Assemble the cross bar and bracket, cinch down the 8 nuts and you are done. Solid as a rock, looks sanitary, You will have a great installation with zero drilling of holes in your popup trailers roof. As Coleman accessories are almost impossible to find and costing a kings ransom if you do this is a great installation. I have had many Coleman popup owners checking this out. Next, install a bike carrier next to my Thule Accent 1600.
The product was well packed, and all parts were present and undamaged. At first I was a bit disappointed that this roof rack was so heavy. But upon assembly and fitting to my trailer top, I realized that heavy duty steel is exactly was was needed to span such a long distance and still support a load. Initial assembly only took 5 minutes. Fitting to the roof, marking mounting holes, drilling, and installing took about 2 hours, but I was very careful (you are, after all, drilling holes into the roof of your trailer/topper!). In addition, I had to clip the ends of all 8 lag bolts because they poked through the ceiling of the camper. I imagine this is a pretty common issue (as most pop-ups are constructed in the same or similar manner). I chose to clip them each because I already had a large bolt cutter, and clipping bolts is easy for me. I strongly recommend opening the package and taking the lag bolts to your local hardware store and purchasing similar zinc lag bolts that are about 1/2" shorter if you don't have bolt cutters . You certainly don't want sharp points poking through your camper top, as they will damage your camper sides when it's in the packed position. I also strongly recommend "dry mounting" your intended load or rack prior to marking and mounting this roof rack . I mounted bike rack trays to the roof rack, and found out after the fact that if I had slid the roof rack bars just a smidge closer together, my bike rack trays would have fit perfectly. As it is, I had to mount them slightly offset from each other because the roof rack was already fixed in place. I would buy this roof rack again in the future. I'm very happy with the quality and the price.