DIY Tonneau Cover Kit
Build your own modular truck bed cover — no over-engineering required.
This kit includes the specialty components you’ll need to make a custom tonneau cover in your own workshop. Pair it with EuroFence aluminum panels and adhesive (available at most home improvement stores) and you’ve got everything you need to slide a functional cover into your bedrails: just like our flagship model, but fully DIY.
Perfect for makers, modders, and anyone who’d rather build than buy.
What’s Included
- UHMW Slide Pieces: CNC-milled from 0.5" ultra-high molecular weight polyethylene. Includes 10 full-size connectors for joining EuroFence panels and 2 smaller slides for rear panel fitment.
- Strap Kit: For fast, easy tonneau removal. Includes mounting hardware.
- Weather Stripping: Two strips designed for a snug, low-profile seal inside the R1T bed.
Compatibility
- Designed for Rivian R1T with factory bedrails
- Intended for DIY applications using EuroFence aluminum fence panels
- Does not include aluminum panels or adhesive — sourced separately
If you're unsure about fit, tools, or panel compatibility, shoot us a message first. We’re happy to help and always curious to see your builds.
Let customers speak for us
The customer service was outstanding, 3 days from order to receipt is amazing in today’s world. The product is excellent. While described as slightly marred, it was barely noticeable. Highly recommended your company all around
As disclosed, not fully water tight. That’s the only improvement I wish they could make. But it’s not super leaky & so far seems to be quite solid - looks sweet too.
Love this product. Shipped quickly. Easy to install.
Previous ordered Rivian tonneau and a piece broke and their customer service was terrible. If choosing between this and Rivian for tonneau, save yourself the headache and get interrobang.
Easy install, secures bed, quality product. Glad I bought it. Recommend it!
Very small leakage in moderate rain, sturdy, easily installed and secure. Probably a better sliding design than the OEM version.
Not light weight. Matte surface collects dust. Panels are longer than the bed is wide or long so in practice they are best stored in the pass through or at home. Did not buy the storage bag. Saved the shipping box and materials instead. A proper pole to pull out bed contents from behind the tailgate may be a good idea. My after market bed liner is not slippery which can make smaller item retrieval difficult.
Would buy again.
This tonneau cover is awesome! Super solid, but light enough to remove and store with just one person. Fits perfect, and even though it's not water proof, even after a car wash there's a very minimal amount of water ingress. Tasteful, minimal, branding makes this a fantastic choice. Also, if you're concerned about the B stock, don't be! I couldn't tell you what landed this cover in B stock, looks brand new to me!
I am very happy with both the quality of the tonneau cover and how easy it was to install. I have done this on several other vehicles and quite honestly it was a pain in the ass to get everything put together for a good fit. This cover slides right into the slots that are already there and each piece locks into the other piece. It took me five minutes tops to unpack it and get it installed.
Hey, we are senior citizens and we just got our tonneau cover today and installed it in less than five minutes. We love it, it looks great, is very sturdy and was super easy to install. You can’t go wrong with this cover. We got it quickly and it was just as advertised. Great company to work with, user friendly website. Hope they get more of the gear tunnels for sale. Happy in Sun Lakes AZ
Looks and fits great! No noticeable blemishes to make it B stock. Tonneau was packaged well.
Had been waiting on an update for the motorized tonneau cover from Rivian for a year and a half and after reading some good reviews online I pulled the trigger on the Interrobang B Stock. Firstly, customer service (dealt with Sara) was amazing. Easy, helpful, just awesome experience all the way around. Though I got a B Stock, I couldn't find a blemish on it. it fits perfectly, easy to use, very sturdy. Couldn't be happier!
Great service and product. Highly recommend for your R1T.
Was easy to install, looks good, and is sturdy. Only someone that knew what to look for could distinguish from the factory auto-tonneau. Drove it in heavy rain and there was just a small amount of water visible on the sides of the bed.
Easy to install, looks amazing could not be any happier with it.
The build quality on this is amazing. The way the slats fit into each other and the sides of the truck bed is very satisfying and feels secure and strong. The finish on the metal is beautifully done. Top notch product all around.