There is nothing subtle about the Triumph Rocket 3. It is a 2,500cc sledgehammer of a motorcycle, built around an engine that looks like it belongs in a tractor and produces enough torque to reverse the Earth's rotation. It is massive, unapologetic, and aggressively fast. It is also, frankly, a terrifying machine to put a passenger on.
That is where Watsonian’s new GP700 sidecar kit comes in.
Pairing classic British art-deco curves with a muscle cruiser might seem like a styling exercise, but the real appeal here is entirely practical. It turns a solo brute into something you can actually share without inducing a panic attack.
I learned the value of a sidecar firsthand on a road trip with my ex and his mom. I’m a smaller rider, and I haven’t quite mastered the physics of wrestling a heavy bike with a pillion on the back. Managing weight shifts, braking dynamics, and top-heavy balance with a passenger takes a level of strength and confidence I wasn’t ready for. A sidecar made all of that irrelevant. It removed the passenger technique from the equation entirely. It felt stable, predictable, and remarkably relaxed.
For a lot of guys, sidecars feel like artifacts from a bygone era—something Indiana Jones rides in, not something you bolt to a modern muscle bike. In reality, they solve very modern problems. If you want to bring someone who can’t (or shouldn’t) cling to your waist for three hours through a canyon, a sidecar makes it possible.
Sometimes it’s about physical limitations like bad knees or a bad back. Sometimes it’s just about comfort. My 79-year-old mom is absolutely not going to straddle a Rocket 3 pillion seat, but she’d ride in a sidecar all day. It changes the conversation entirely.
But bolting a sidecar to a Rocket 3 isn’t just a matter of tightening a few bolts. The Moto-Station release notes that Triumph’s massive inline-triple produces 221 Nm of torque, which is no small number to design around. Rather than relying on a generic mounting solution, Watsonian engineered a bespoke, heavy-duty tubular steel subframe dimensioned specifically to support that output. It’s triangulated and set up so the geometry doesn’t go weird when you crack the throttle.
The art deco lines of the GP700 may draw you in, but it’s the structural work underneath that actually makes the pairing viable. Adding a third wheel obviously changes the ride. You don’t lean into corners. Steering becomes a physical wrestling match. Braking and acceleration shift the bike’s balance laterally. There’s a steep learning curve, and you have to respect the physics.
But once you figure it out, the sidecar stops being a novelty and starts being a tool for access. The Rocket 3 is already an event every time you hit the starter button. The Watsonian kit just guarantees you don't have to experience that event alone.
