Bed cap roof racks ???

I have a bed cap on my 13' double cab taco. Unfortunately it has a smooth top and no grooves for mounting. Does anyone know how to attack roof racks to my fiberglass cap? If so what mounts, racks, brand, etc will work?

 

You're gonna have to contact the manufacturer and see what the load rating is.
If it doesn't have any supports underneath, you might have a tough time installing one.

Obviously, the best place to mount rails or feet is going to be on the curve. That's going to be the strongest point. But, if it wasn't meant for much of a load, you might do some serious damage to the topper if not mounted correctly.

 

You can drill into the cap and mount the rack feet directly to the cap or mount tracks to the cap, to which the feet will connect. I prefer the tracks since it allows for adjustability and is more low-profile with the rack removed. I have a Leer cap and I contacted several different installers including the manufacturer trying to decide whether to mount the tracks through the thicker "honeycomb" in the center of the cap or through the fiberglass near the edges and could not get a consistent answer. I decided to go straight through the fiberglass on the edges of the cap. It has worked fine so far but I have not carried much weight yet. The tracks are mounted parallel to each other which makes them look crooked to the eye since the cap is not perfectly square.



I already had yakima towers so I went with Yakima tracks, but I would also look into rhinoracks - looks like a quality product. Rerack sometimes has used components.

Measure twice and drill once!

 

Some other really good discussion that helped me:
https://www.tacomaworld.com/threads/roof-rack-on-toppers.107470/
https://www.tacomaworld.com/threads/mounting-a-roof-rack-on-a-camper-shell.518448/

 

I pretty much did the same as @flyby and went through very near where the edge radius begins. Sorry I don't have better pics.

I pulled a rack off a mid 1990's Isuzu Rodeo at my local salvage yard. $22.50 and done! I used the Rodeo rack because the roof of the Rodeo is very flat, much like a shell roof. Also, I liked the length. Only problem is the small cross bars that are supposed to mount flat to the roof are just a tad too long and have some arch up off the roof.

I am not planning on hauling more than 50#s or so. Maybe a ladder or whatever. Just very light stuff. It's as much for looks as anything.

 

Do a search, there are penty of threads on this but DO NOT mount on the thicker part of the roof. The honeycomb material is a cardboard like material and you can not tighten down the fasteners without damaging it unless you do something radical like glassing in solid spacers. The honeyomb material is to strengthen the roof so it doens't flex or vibrate going down the road. In additon to the versatility of moveable racks, using tracks also helps distribute the weight over a greater area.