The subject of ride quality can be a complex topic when discussing premium, Bosch-equipped e-bikes, but I found the Vektron P5i refreshingly straightforward and simple. Bells, whistles, and tons of features can make a bike stand out, but simplicity is also a beautiful thing; the Vektron is a great example of the latter.
Tern makes the P5i in a single frame size. With 11.75 inches of saddle height adjustment, courtesy of a dual-telescoping seatpost, and the brand’s custom adjustable Andros stem, it can realistically accommodate riders from roughly 4’10” to 6’5”.
Those on the taller end of the spectrum may have a more forward-leaning riding position, while shorter folks may be more upright, but in all cases, they should be reasonably comfortable.
At 5’11”, I fall well within the bike’s advertised height range, and I enjoyed a comfortable, properly-fitted ride with full leg extension and mostly upright positioning. I also liked the bike’s sport-style saddle and soft, supportive ergonomic rubber grips.
As I mentioned in the introduction to this review, the Vektron P5i’s handling was also a highlight. At 54 lbs, it may not exactly be lightweight, but it is far more nimble and maneuverable than many other folding e-bikes we’ve tested weighing upwards of 70 lbs. The bike steered quickly, cornered predictably, and generally felt lively and agile.
While the bike does not feature any form of suspension, its 20×2.15” tires offer enough width and volume to smooth and stabilize the ride. While I typically stood to avoid jarring impacts when rolling over large bumps, the combination kept me comfortable in general riding situations.
I’ve discussed the motor’s responsiveness, but it’s worth reiterating that the bike is remarkably natural-feeling and intuitive. As we’ve commonly found when reviewing Bosch-equipped e-bikes, the Vektron’s pedal assist system is top notch, with mostly quiet operation, smooth power delivery, and enough power to supplement your pedaling without overtaking it.
I found the P5i to be approachable and uncomplicated with a low learning curve. The bike’s interface is straightforward, with a handlebar-mounted button pad to adjust power level, a basic-but-effective black-and-white display with a wide array of ride data, a high-powered integrated lighting system, and a twist shifter for the 5-speed Shimano Nexus hub.
Experienced riders should have no trouble hopping on the bike and pedaling, while those new to e-bikes should only need a brief run-through of its functions to be ready to roll.
In addition to the basics, the Vektron P5i comes with a well-placed removable battery, an ABUS rear wheel lock, fenders, a chain guard, and a cargo rack that can carry up to 59 lbs. Riders looking to equip the bike for more utility can add optional storage baskets and bags, along with a front rack or luggage carrier.
I found the bike generally well-equipped for daily use, though I had hoped to see integrated brake lights and perhaps turn signals—especially considering its urban-centered design.
I was also somewhat disappointed to learn that the Bosch Flow app, which allows users to tune motor output, access security features, and get navigation, is only available on Vektron models outside the US. Our contact advised us that Tern opted for a lower-tech option to reduce cost, but I wouldn’t mind seeing an upgrade option in the future. After having the chance to test the app previously, I missed these features on the top-tier model!
As a folding e-bike, the Vektron’s portability factor is another important element of its engineering and construction; Tern advertises a 10-second folding time to get the bike ready for storage, packing into a vehicle, or rolling on public transit.
While I didn’t quite get the process down to such a short time, it is clear to me that it is possible with more practice. The folding process is simple; users have only to drop the saddle, adjust the handlebar angle, open the hinged frame, then rotate the front wheel so its metal plate will contact the rear wheel’s magnet. With the collapsible stem folded and both wheels secured, a rubber strap can hook to the stem for extra security.
Additionally, once folded, the drive-side pedal can be removed via a quick-release mechanism to reduce the bike’s overall width. It’s an elegant design that is fast, works well, and feels generally intuitive. Once collapsed and folded, the bike measures roughly 33.5”L x 16”W x 27.5”H.
Tern’s e-bikes are also known for a unique party trick: many models offer the ability to stand vertically on four “legs” that protrude from their cargo rack. The Vektron is one such model; the bike can stand upright when folded or unfolded for stability and to take up less floor space.
In summary, the Vektron P5i is just about everything we’d want in a premium folding e-bike; it’s sturdy, agile, comfortable, responsive, and both extremely utilitarian and easy to use. The fact that its sealed, protected drivetrain is clean, quiet, and low-maintenance is simply the icing on the proverbial cake!
