At Rusty Stitches, we’re always excited to dive into the world of motorcycles! In this blog, we swung by Goos Bos of Tripteq to finally find out: are three wheels better than two?

The Man Behind the Machine
To find out, we rode out to Moto Hengelo to catch up with Goos Bos, a guy who’s been a staple in the scene for years. You might know him as the former owner of a Motoport Hengelo or from his uniek custom builds, but we’re here for his real passion project: Tripteq.

Goos isn’t some suit chasing spreadsheets. He’s a builder, a rider, and a guy who knows which end of the wrench to hold. Years ago, he was running the corporate race, managing a team and pushing units. But the higher he climbed, the further he got from what he actually loved: the grease, the metal, and the mechanics.

So, he ditched the desk for the workbench.

When we walked into his shop, he was deep in it, working on a Harley-Davidson Sportster. But this wasn’t your standard cruiser; he was fitting it with a custom off-road sidecar. An off road rig on a Harley? Yeah, welcome to Tripteq!

Testing Limits in the Pyrenees
“This one’s mine,” Goos tells us with a grin. He just got back from a trip to Spain, tearing up off-road tracks in the Pyrenees with a group of friends. And yes, he did it on the Harley with the sidecar attached! “I completely modified the setup before we left,” he explains. “I wanted to see if it would hold up under real stress. And let me tell you, I didn’t take it easy. I abused it.”

The result? It held up great. “I learned a ton about the forces at play when you really push a rig to the limit. Now I know where the weak points are on this frame in development, and I’m back here improving the frame.” It’s product development with both feet on the ground.

The DIY Philosophy
After Goos handed us a fresh coffee, we took a closer look at a sidecar mounted on a BMW GS1100. This type of machine is Tripteq’s absolute bread and butter. They have carved out a massive niche by offering a wide range of specific “bolt-on” kits for BMW motorcycles. Why? Because those bikes are just begging for a third wheel.

But they don’t stop there. While they specialize in high-quality, plug-and-play kits for BMWs, they also offer universal setups. These robust kits are designed for the builders out there. With a bit of skill and some creativity, they can be bolted onto just about anything with a frame and an engine. But if you’re not quite ready to pick up the wrench yourself, don’t worry, Goos is more than happy to handle the installation for you.

And the best part? You can also build it yourself!
Every part and kit is TÜV-certified, which means the paperwork should be a breeze. But the real kick comes from the philosophy behind it. When Tripteq started in 2005, Goos saw a massive gap in the market. You were stuck with either ancient, clunky buckets or overpriced custom builds. There was nothing for the guy who wanted to build a solid, affordable rig in his own garage. Goos refused to accept that. He looked at the options and said, “Fine, I’ll do it myself.”

Enter the Heeler
That stubbornness gave us the Heeler. Named after the Australian Cattle Dog, it’s exactly what you’d expect: compact, tough, and loyal. Goos showed us the frames. They are engineered to bolt directly onto BMW R-series bikes. No cutting, no welding. It’s plug-and-play, but you still get the satisfaction of dirty hands and a job well done.

Why Three Wheels?
If you’ve never ridden a sidecar, you’re missing out. Goos puts it simply: riding a solo bike is about flow and leaning. Riding a sidecar is work. You steer it, you throttle through corners, and you are constantly wrestling with physics. It’s an active, addictive, and raw experience.

Whether it’s the rugged Heeler or the classic lines of the Fox model, Tripteq isn’t just selling parts. They’re giving you the tools to turn your motorcycle into a sidecar rig with real character.

Built, Not Bought
Leaving Tripteq, we were reminded why we love the motorcycle culture. It’s not about buying the most expensive toy in the showroom. It’s about the story, the build, and the character of the ride and rider.

Goos Bos proves you don’t need a massive factory to change the game. You just need a good idea, a set of tools, and the guts to build what you can’t buy.

Want to get your hands dirty? Check out the goods at tripteq.com.

Thanks Goos, for letting us take up some shop time! And maybe… just maybe, our Big Monkey “Rusty” will be swinging by with that mini-bike for a miniature sidecar rig.

Auteur: Arthur Renkema
Fotograaf: Rob Willemsen