The bike is offered in two sizes: a Medium for riders 5’4”+ and a Large for those 5’8”+. At 5’11”, I was pleasantly surprised at how comfortable the medium frame of our test bike was; with a relatively stretched and aggressive riding position, I would have guessed we had the larger model.
The bike’s contact points (saddle, grips, and pedals) were extremely comfortable. Our test bike was standard, aside from its color (a raspberry-like purple hue) and TranzX suspension seatpost. I am confident I would have liked the standard saddle without the upgraded seatpost, but I highly recommend one of the three suspension options for a smoother ride.
Handling is one of the primary areas we hope Biktrix will improve. We appreciated the Duo ST’s relatively nimble handling—a result of its 24” wheels—compared to many other fat bikes with larger 26” wheels. But the step-thru frame had a lot of flex when cornering, creating a loose feeling on faster turns that was not helped by its soft suspension fork.
It is possible that the standard RST Guide suspension fork on our test bike was a dud, but we recommend that Biktrix upgrade to a sturdier base model.
It’s also fair to point out these problems aren’t unique here – they are true of most fat tire e-bikes with step-thru frame. That’s why ST models are often best suited for paved areas instead of lots of off-roading or quick cornering.
Critique aside, we liked the motor’s quick engagement; it delivered power immediately without overrun. We also appreciated the near-effortless nature of the bike’s pedal experience, but we also recognize that many riders seeking a mid-drive will expect the more natural and adaptive feel of a torque sensor.
Fortunately, for those seeking such an experience, Biktrix offers a higher-end model of the Juggernaut with a 1,000W mid-drive and a torque sensor: the Juggernaut Ultra.
Less ideal is that shoppers will need to sift through a myriad of similar models to find the one they want; we counted 28 models with various frames, motor types, suspension options, etc. We appreciate customization options and variety, but we urge Biktrix to consolidate its catalog of options to be less confusing and more user-friendly.
We found the bike’s interface to be easy to use. You can adjust speed (or other) settings with a double press of the “i” button or switch between riding modes by holding the “+” button. The Juggernaut has one of my personal favorite control panels, with easy-to-press buttons and a very tactile feel.
The Juggernaut Classic Duo ST’s strengths are its comfort, easy pedaling, and powerful/aggressive feel, though it also has room for improvement.
