Bosch just launched the Hub Line, its first-ever hub motor after two decades of building only mid-drive systems, and I got to ride it in Europe last week, before most of North America even knew it existed. The short version: it is the smoothest, quietest, most invisible e-bike motor I have tested. The Hub Line puts 45 Nm of torque directly into the rear hub, weighs about 5 lbs, and disappears so completely into the wheel that the bike barely looks electric. Bikes built around it start arriving in 2027, and if my ride is any indication, it is going to change what people expect from a city e-bike.
In this article
- What is the Bosch Hub Line?
- What is it actually like to ride?
- Hub Line vs. mid-drive: what's really different
- Smart system, theft protection, and the eBike Flow app
- Is the Hub Line certified and legal to ride in Canada?
- When can you actually buy one?
- FAQ
What is the Bosch Hub Line?
The Hub Line is Bosch's first hub-mounted drive unit, built for city and commuter e-bikes rather than mountain or cargo use. Instead of sitting at the crank like Bosch's familiar Performance Line and Active Line motors, it is built into the hub of the rear wheel, about 4 inches across and roughly 2.3 kg (5 lbs) on its own.
On paper it is a compact, efficient commuter motor:
- 45 Nm of max torque, applied straight to the rear wheel
- Up to 400 W peak power, 250 W continuous (the legal pedelec limit in Europe)
- Fully decouples above 32 Kph in North America (25 km/h in Europe), so there is zero drag once you are cruising
- Pairs with the Bosch PowerTube 360 battery for a claimed range of over 80 Km's and even more range on some models with larger capacity Powertube batteries.
- Runs on Bosch's smart system, with over-the-air updates and app-based personalization
- For the North American market, a throttle is available, so riders can choose pure pedal assist, throttle-only, or a blend of both. For those that do not want a throttle this can be removed if preferred. Not that bikes supplied with a throttle cannot have a throttle added as an aftermarket accessory as the ebikes must be programed at the factory level to avoid tampering in regions where throttles are not legally permitted.
North American riders get a throttle. Unlike the European version, Hub Line bikes sold in North America will offer throttle assist alongside pedal assist, plus the option to blend both together, giving riders more flexibility for stop-and-go city riding.
What is it actually like to ride?
This is the part spec sheets cannot tell you, and it is the part that surprised me most. I personally spent time test riding the Hub Line in Europe last week, and I came away genuinely impressed with how responsive it felt. On paper the motor is rated at 45 Nm, but the power delivery felt like a lot more than that, closer to a 60 to 65 Nm motor in the way it actually moves you. That is a subjective impression, not a spec Bosch publishes, but it is a strong one, and it is great news for how this motor will feel on the road.
What stood out even more than the power was how the power arrives. It was smooth and the responsiveness was top notch. Compared to other hub motor systems I have tested, this one feels human like and civilized rather than jerky or grabby. That distinction matters more than most spec sheets let on: riders feel like they are in control of the bike, not the other way around. That is a genuinely impressive achievement for a hub motor, a category that has historically felt blunt compared to a good mid-drive.
Roll away from a stop and the Hub Line gives you a direct, immediate push, there is no lag while a mid-drive motor waits for cadence to build. Bosch's Auto mode reads your pedaling through sensor fusion and adjusts support without you touching a button, and it worked well enough on cobblestone streets and stop-start traffic that I mostly forgot it was there.
Above assist speed, the motor decouples completely, so there is none of the faint drag some hub motors have once you outpace the assist. You are just riding a normal bike again, only lighter feeling because the whole system, motor and battery combined, comes in under 11 lbs.
It is not trying to be a mountain bike motor, and Bosch is upfront that this is a city tool, not a climbing tool. But for flat and rolling urban riding, I will say it plainly: this is the best hub motor system I have ever ridden, and I would go further and say it is the best hub motor currently on the market, period.
Hub Line vs. mid-drive: what's really different
If you have shopped for an e-bike before, you already know the general trade-off between hub and mid-drive motors. Here is how the Hub Line specifically stacks up against Bosch's own mid-drive systems, like the Performance Line and Active Line families.
| Category | Bosch Hub Line | Bosch mid-drive (Performance/Active Line) |
|---|---|---|
| Motor location | Rear wheel hub | Crank/bottom bracket |
| Feel | Direct, immediate push at the wheel | Power runs through your gears, feels more gradual |
| Best for | Flat to rolling city riding, commuting | Hills, cargo loads, mixed terrain |
| Weight and look | Nearly invisible, cleaner frame silhouette | Visible motor housing at the cranks |
| Drivetrain wear | Lower, motor does not load the chain | Higher, chain and cassette see more strain |
| Above assist speed | Fully decoupled, no drag | Also decoupled, but motor mass still at the cranks |
If you want a bike that flies under the radar, feels light, and needs less mechanical upkeep for everyday city riding, the Hub Line makes a strong case. If you are hauling cargo or regularly climbing steep grades, a mid-drive is still the better tool.
The same GPS and alarm hardware that powers Hub Line's theft protection, and it fits Bosch smart system bikes you already own.
Smart system, theft protection, and the eBike Flow app
The Hub Line runs on Bosch's smart system, which means it shares the same digital backbone as Bosch's other current motors: over-the-air updates, ride personalization, and navigation through the eBike Flow app. Bosch also built in tiered theft protection. Switch the bike off and the motor locks automatically at no extra cost. Add the optional ConnectModule and a Flow+ subscription, and you get GPS tracking and alarm alerts if the bike is moved.
Worth noting: Hub Line uses an adapted set of smart system features, not the full lineup. It is not compatible with Bosch eBike ABS, or a few of the more aggressive riding modes like Race and eMTB+. That is by design. This motor is built for commuting, not trail riding.
Want a clear, at-a-glance display on your current Bosch smart system bike? This mount kit fits the same Kiox 300 unit riders pair with Hub Line bikes.
Is the Hub Line certified and legal to ride in Canada?
Yes. The Hub Line's full drive system, motor, battery, sensors, display, and cables, is certified to UL 2849, the e-bike electrical and fire safety standard, and the batteries themselves are separately certified to UL 2171. That is the same certification standard every Bosch-powered bike we sell is built to, so Hub Line is not cutting any corners to hit its smaller size and weight.
Top speed is 32 km/h (20 mph), which lines up with Canadian e-bike regulations and North American Class 1/2 rules. That is faster than the 25 km/h (15.5 mph) assist cutoff you will see quoted on Bosch's European pages, since the North American version is tuned to local law rather than the EU pedelec limit.
When can you actually buy one?
Not yet, and not for a while. Bosch has confirmed the Hub Line will appear on production bikes starting in Q1, 2027, from some of the brands we sell. Pricing for complete bikes has not been announced but will start from around $3499.00 Canadian dollars for a complete bike. In the meantime, if you ride a current Bosch smart system e-bike, you can already add the same ConnectModule theft protection and Kiox 300 display that Hub Line bikes will ship with.
Frequently asked questions
What is the Bosch Hub Line?
The Hub Line is Bosch's first hub-mounted e-bike motor, built for city riding. It delivers 45 Nm of torque and up to 400 W of peak power from a roughly 5 lb unit built into the rear wheel hub, and it runs on Bosch's smart system.
Is the Bosch Hub Line as powerful as a mid-drive motor?
Not in raw climbing torque. Bosch's mid-drive motors are still the better choice for hills and cargo loads. The Hub Line is tuned for flat and rolling city riding, where its direct, low-drag feel and lighter overall weight matter more than climbing power.
How much does the Bosch Hub Line weigh?
The motor itself weighs about 2.3 kg (5 lbs). Paired with the PowerTube 360 battery, the full drive system comes in at just under 11 lbs.
What is the range of an e-bike with the Hub Line?
With the PowerTube 360 battery (360 Wh), Bosch states a range of over 80 Km's, extendable further with the optional PowerMore 250 add-on battery. Actual range depends on terrain, rider weight, and riding mode.
Does the Hub Line have theft protection?
Yes. The motor locks automatically when the bike is switched off at no extra cost. Adding the optional ConnectModule and a Flow+ subscription layers on GPS tracking and alarm alerts.
Does the Bosch Hub Line have a throttle?
For the North American market, yes. Riders can choose to ride the bikes under pedal assist, throttle-only, or a combination of both, which is different from the European version that runs pedal assist only.
What is the top speed of the Bosch Hub Line?
In North America, the Hub Line is set to a top assisted speed of 32 km/h (20 mph), in line with Canadian and North American e-bike regulations. The European version is limited to 25 km/h (15.5 mph) under EU pedelec rules.
Is the Bosch Hub Line UL certified?
Yes. The full drive system is certified to UL 2849 and the batteries are certified to UL 2171, and the system is fully compliant with Canadian e-bike law.
When can I buy an e-bike with the Bosch Hub Line?
Bosch has said production bikes with the Hub Line will start arriving in Q1, 2027. Our ebikes will start at approximately $3499.00 for complete bikes.
Ready to upgrade your current Bosch e-bike?
You do not have to wait until 2027 for smarter theft protection and a clearer display. Shop Bosch smart system accessories at Scooteretti today.
Shop Bosch Accessories →Questions about compatibility with your bike? Book a tune-up with our service team.
Sources: Bosch eBike Systems, Hub Line product page and BikeRadar.
About the Author
William Leishman
Founder & President, Scooteretti
William Leishman is the Founder and President of Scooteretti, one of Canada's leading electric bicycle retailers and a recognized authority in the eBike industry since 2010. As a member of the National Bicycle Dealers Association (NBDA) Advisory Board for eBike Safety, William plays a central role in shaping best practices and safety standards across North America, and is regularly featured on television, radio, print, and digital media as a trusted voice for consumers and industry professionals alike.
William's core mission is to educate Canadian consumers on choosing the right electric bicycle, one that truly fits their lifestyle, budget, and safety needs. As Canada's eBike market has exploded with new options, too many riders are purchasing the wrong bike, spending thousands across multiple purchases before finding a good fit. Scooteretti's "buy it once, buy it right" philosophy was built to solve exactly this problem, and it has helped thousands of satisfied customers make confident, informed decisions since 2010.
Beyond finding the perfect ride, William is on a personal mission to make eBike safety a national priority. He is a passionate advocate for making UL certification mandatory for every electric bicycle sold in Canada, a standard he believes every Canadian deserves, yet one that current legislation does not require. William is actively working to raise awareness among consumers and at all levels of government, because he firmly believes that no Canadian should have to risk their safety on an uncertified eBike. This isn't just a business position, it's a personal commitment he is dedicated to seeing become law.
