Tern NBD S5i vs RadKick

What the Tern is really built to do

Tern says the NBD S5i uses an ultra-low 39 cm standover, Bosch Performance Line support up to 65 Nm, a Gates belt drive, Shimano Nexus INTER-5E hub, and a Gaia Rack that works with many child seats. More important than any one spec is the mission of the bike: reduce awkward moments. Starts, stops, mounting, sharing the bike between riders, and parking indoors are all supposed to feel easier than they do on a typical city e-bike.

Tern also leans hard into support and longevity. The bike is sold through a dealer network, assembled locally in many cases, and positioned as a durable, serviceable bike rather than a disposable one. That matters because the NBD is often bought by people who want fewer surprises later, not just a prettier spec sheet.

What the RadKick is built to do

RadKick is trying to be a lighter, lower-cost city bike that still feels clean and approachable. Rad has highlighted a belt-drive version under roughly 55 pounds, torque-sensor support, and an easier price than premium compact utility bikes. That gives it a straightforward appeal: easier to store than many heavier utility e-bikes, cheaper to justify, and less intimidating than a full cargo bike.

What it does not try to be is a purpose-built accessibility solution. You are not paying for ultra-low-step design, unusually calm fit geometry, or the same level of premium service ecosystem. If you just need transport, that may be fine. If you need confidence, the difference shows up fast.

Where the NBD earns the extra money

• Mounting confidence: The ultra-low step-through and low center of gravity are not marketing fluff. They matter every time you stop at a light, restart with a passenger, or get on in regular clothes.
• Shareable fit: Tern says it fits riders from 4'10" to 6'3" and resizes quickly, which matters for mixed-height households.
• Long-term cleanliness: Belt drive plus internal gears means less chain mess, less routine fiddling, and a calmer ownership experience.
• Indoor practicality: Tern emphasizes vertical parking and easy rolling in tight spaces, which is a real apartment or office advantage.
• Better family upside: The rack and child-seat compatibility make it a real one-kid utility option instead of just a solo cruiser.

Where the RadKick wins

• Price: This is the obvious win. RadKick makes much more sense if the NBD price feels like over-solving the problem.
• Simpler city-bike mission: If your rides are mostly flat-to-moderate urban miles without passengers, the Rad can do the job for less.
• Lower emotional commitment: Some riders do not need a bike that feels specialized. They need something decent, useful, and easier to store than a heavier utility machine.

How the ownership experience differs

The NBD is the bike for people who notice friction. If it annoys you to swing a leg high, steady a top-heavy bike, lift a battery in a cramped hallway, or wonder whether a future shop visit will be a hassle, the Tern makes more sense. The Bosch system and dealer-first support structure are part of the value story.

The RadKick is better for buyers who are comfortable doing the ordinary value-brand math: less initial cost, fewer premium touches, and a setup that is good enough if your use case is modest. That can be the smarter buy. It just is not solving the same problem as well.

Who should buy the Tern

Buy the NBD if you are shorter, older, nervous about mounting taller bikes, sharing one bike between very different riders, or trying to keep indoor storage and daily use low drama. It is also the better choice if you may add a child seat and want the bike to feel stable, calm, and intentionally designed for that kind of life.

Who should buy the RadKick

Buy the RadKick if you mainly want affordable urban transportation with cleaner ownership than a chain-driven bargain bike. It is the better answer when your routes are modest, your budget matters more than premium support, and you do not need the Tern's specialty fit advantages.

Bottom line

The Tern NBD S5i is better when the job is confidence, easy mounting, indoor friendliness, and premium low-maintenance ownership. The RadKick is better when the job is simply to get a practical city e-bike for less money. Buy the Tern because you genuinely need what makes it different. Buy the Rad when you mostly need value.