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DIMENSIONS
52 cm x 30 cm x 15,5 cm (H x W x D)
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VOLUME
23 L
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WEIGHT
1.7 kg
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LAPTOP POCKET
16"
Helsinki Pro Bike by Kapten & Son – The Cycling Backpack for Office-to-Gym Days
8:03 AM. Laptop packed, gym gear zipped in, helmet clipped, coffee in hand. You hook the Helsinki Pro Bike by Kapten & Son onto your rack and roll out. Built for commuters who carry a real day with them, this 23L bike backpack combines secure rack-mounted functionality with the comfort of a proper everyday backpack. With its optimised full back opening, padded laptop compartment, integrated rain protection, reflective details and clean urban silhouette, it is made for the daily rhythm from bike lane to office to gym — without having to switch bags halfway through the day.
Who is it for?
Urban cyclists, hybrid workers, people who train before work, train-and-bike commuters, and anyone who wants a commuter backpack that works just as well on the rack as it does on your back. If your day moves between meetings, errands, changing rooms and quick café stops, the Helsinki Pro Bike keeps everything organised, protected and easy to grab while staying sleek enough for everyday city life.


What Makes It Stand Out
- 🚲 True bike-to-backpack design: The Click & Go system lets you clip the bag securely onto your rack with two upper hooks, then stabilise it further with a lower guide rail that rotates 180° and adjusts sideways for a better fit.
- 📂 Optimised full back opening: Instead of digging from the top and hoping for the best, the rear opening gives you a clear suitcase-style overview of your gear — ideal when you need your laptop, charger or gym kit quickly.
- 💻 Built for work essentials: The padded laptop compartment measures 43 x 29 cm and fits 15.6" laptops and 16" MacBooks, while the 23L format gives you room for clothes, lunch, tech and the rest of your daily carry.
- 🧩 Seriously organised interior: Five lined internal pockets, including one zipped pocket and two microfleece-lined compartments, plus multiple front pockets, drink holders on both sides and an anti-theft back compartment keep the small stuff under control.
- 🌧️ Ready for real commutes: Water-repellent vegan materials, integrated rain protection, helmet and light attachment options, and reflective details make it a smart all-weather companion for cycling and everyday mobility.
For work, it holds your laptop, charger, notebook and daily essentials. For training, it fits gym clothes, shoes, toiletries and a bottle without turning chaotic inside. And once you are off the bike, you can open the two side zips of the Click & Go system, roll it up into the bottom compartment and carry it comfortably on your back with the padded straps and chest strap. One bag, two modes, less hassle.
Why You’re Going to Love It
Some cycling bags work well on the bike but feel awkward the second you step off it. Others are comfortable to carry but annoying to mount. The Helsinki Pro Bike lands in the sweet spot: secure on the rack, comfortable on your back, and organised enough for people whose days do not happen in one place.
- Clips onto your bike rack quickly and securely, then transitions back to backpack mode in just a few steps.
- Keeps work gear, valuables and daily essentials cleanly organised thanks to its smart pocket layout and wide rear access.
- Feels like a real commuter backpack off the bike, with padded adjustable straps and a padded back panel for everyday comfort.
- Handles changing weather and low-light rides with rain protection, reflective details and a front-facing light attachment point.
- Stays useful beyond cycling with its suitcase attachment, clean city look and versatile 23L everyday format.
If you have been looking for a bike backpack for commuting that can genuinely keep up with everyday life — office, gym, errands, train connections and wet streets — this one gets the balance right. The Helsinki Pro Bike is practical without feeling overbuilt, and sleek without sacrificing the features that actually matter. Pack your day once, clip it on, and get moving.
Need a Kapten & Son bag with a similar clean aesthetic but without the bike mounting system? Take a look at the Bergen Pro for a more classic urban backpack setup, or the Lisbon backpack if you want expandable roll-top flexibility for longer days. You can also explore all our Kapten & Son backpacks to find the format that fits your routine best.

Technical Specs – Helsinki Pro Bike
Brand: Kapten & Son
Product type: Bike backpack / commuter backpack with rack-mount system
Style: Minimalist, urban, technical, unisex
Main materials: 58% PU, 39% recycled PET, 3% polyester
Inside colour: Grey
Dimensions: 52 (H) x 30 (W) x 15.5 (D) cm / 20.5 (H) x 11.8 (W) x 6.1 (D) in
Volume: 23 L
Weight: 1.7 kg
Laptop compartment: 43 x 29 cm (fits 15.6" laptops and 16" MacBooks)
Closure system: Zipper
Water-repellent: Yes
Vegan: Yes
Anti-theft pocket: Yes
Suitcase attachment: Yes
Comfort: Padded back and adjustable padded straps
Included features: Rain protection, helmet attachment, front-facing attachment point for a light, reflective details, chest strap, Click & Go bike rack system
Suitable for bottles up to: 0.75 L
Pockets & organisation: Five lined internal pockets, including one zipped pocket and two microfleece-lined pockets; one large front pocket with a zip; one flat front pocket with a water-repellent zip; one small front pocket with a water-repellent zip; a drink holder on each side; one anti-theft compartment on the back
Bike compatibility: Compatible with bicycles that have a rack with a minimum length of 12 cm and a tube diameter of 10–17 mm
Use cases: Cycling commute, office, gym, everyday carry, train-to-bike mobility, urban travel
SKU: 4251145263690
FAQ
Yes. The padded laptop compartment measures 43 x 29 cm, which makes the Helsinki Pro Bike suitable for 15.6" laptops and 16" MacBooks. It is a strong option if you want a cycling backpack that can handle real office gear, not just a tablet and a charger.
Yes — the Helsinki Pro Bike is compatible with bicycles that have a rack with a minimum length of 12 cm and a tube diameter of 10–17 mm. The two upper hooks adjust sideways, include spacers, and the lower guide rail rotates 180° and adjusts sideways for a more precise fit.
For most people, yes. The 23L capacity is well balanced for a full commuter day: laptop, charger, notebook, lunch, gym clothes, small toiletries and a bottle. It is roomy enough for everyday life while still staying comfortable on the bike and clean-looking off it.
Yes. Once you detach it from the rack, you can open the two side zips of the Click & Go system, roll it up and store it in the bottom compartment. From there, the Helsinki Pro Bike carries like a proper backpack, with a padded back panel, padded adjustable straps and a chest strap for extra comfort.
The bag itself is water-repellent, which is ideal for light rain, splashes and everyday urban commutes. For heavier rain, it also comes with integrated rain protection for extra coverage when the weather turns properly bad.
You grab the loop and clip the two upper hooks onto your rack. When you release the loop, the hooks close around the rack to keep the bag securely in place. For extra security during heavier braking, you can also attach the lower guide rail, which rotates 180° and adjusts sideways for a better fit.
Quite a lot: integrated rain protection, reflective details for visibility, helmet attachment options on the side straps, a front-facing attachment point for a light, a suitcase attachment, drink holders on both sides, an anti-theft back compartment and a well-organised interior with lined pockets for valuables and tech accessories.









