FAQ

Technical

Aren't internal gears for city bikes?

No, when designed properly, they can be highly efficient. We used our background in automotive transmission development to optimise tooth geometry, material selection and production methods with high performance, low weight and durability as the key design goals. On every aspect, we've gone the distance, as we know they all add up to make a huge difference. Our gearing is unlike any other on the market, you cannot feel it. Which is exactly what you want.

How efficient is the hub?

Very efficient! More efficient than a 1x setup and as efficient as a 2x setup. Compared to a 1x, less cross chaining is required, sprocket and chainring sizes are larger and thus chain tension, crank and hub bearing losses are lower. Compared to a 2x; the fact that the 0.7 ratio of the hub still uses the large chainring in front, results in 30% less chain tension and thus lower chain, crank and hub bearing losses. On top of this you will experience that you will use the Classified hub much more frequent than a normal front derailleur, this means that in practice you will have less cross chain losses. The hub does not have any additional losses on in the 1:1 ratio, and is designed to have extremely low losses in the 0.7 ratio which are completely balanced out by the big chainring and straighter chainline by using a Classified setup.

If I want to service the bearing in the hub or driver, what do I have to do?

If you experience play on your Classified hub, contact us and we will get you back on your bike as soon as possible (see service & warranty terms)

The hubshell is interchangeable, is it easy to change?

Yes. There's a lockring under the brake disc that keeps the hubshell attached to the inner hub and driver assembly. This lockring is compatible with your standard cassette lockring tool and a hub swap can be done in as little as a few minutes. Please consult the manual for a detailed hub swap procedure.

What does it weigh?

Unlike most geared hubs, no weight is added to the bike. A Classified equipped bike is equally light or lighter than a bike with a traditional 2x electronic groupset equipped bike and traditional reference hub (eg. DT Swiss 350). To be more concrete, a bike equiped with Classified and 1x GRX Di2 weighs the same (+-10g) as a bike with a traditional 2x11 GRX Di2 groupset and a DT Swiss 350 hub. The bike setup used by our initial partner: Classified in combination with a Rotor Aldhu 1x crank, is up to 70g lighter than the same bike with a traditional 2x11 GRX Di2 groupset and a DT Swiss 350 hub. In short we can state that the weight of the replaced components (front derailleur, small chainring, traditional hub, thru axle and cassette) is approximately the same as the weight of the components offered by Classified.

Do I need a specific cassette?

Yes, Classified uses a proprietary cassette for increased durability and lighter weight. We offer several options so you can optimise your drive train to suit your riding style.

Can I use it for bikepacking?

Yes! Classified hubs can be a great asset when climbing those steep hills with your bike fully loaded. If you're planning to ride for more than 3 months without going home, be sure to pack a micro USB charging cable so you can charge the Classified Thru Axle while sheltering from rain or checking in with your loved ones back home. You can be back on the road within an hour.

What is the lifespan of your cassettes?

Classified cassettes are machined from solid blocks of high grade tool hardend Chromoly-steel. This enables us to create lightweight cassettes with very high durability. Using a high-grade chain (see chain-compatibility section) will ensure you many kilometres of hard use.

What is the durability?

The Classified hub has an operational lifespan exceeding the lifespan of a bicycle’s internal systems, and it requires no maintainance.

Bearings are subject to normal wear and can be replaced.

If for any reason you think your Classified product isn't performing as it did when it was new, contact us and we will get you back on two wheels as soon as possible. (See service & spare parts)

Why does it only have two gears?

By offering 2 gears in combination with a regular derailleur setup, we can offer both a wide range and small gear steps just like you're used to. But by removing the front derailleur you get the dependability and performance you've always wanted.

Our goal is to optimise the drivetrain for performance. This means efficiency, durability and intuitive functionality. We see chain-based drivetrains as a solid platform to achieve this, but we want to remove its weakest link, the front derailleur, as it lacks dependability. Classified offers a wide gear range combined with small gear steps, which was only possible previously using a front derailleur. This is why the Classified hub is operated just like a regular 2x-setup.

How quick does it shift?

Classified shifts faster than anything on the market.
The hub will shift within 0,15 seconds.

Can I shift under load?

Yes, Classified is unique as it can shift under load. You do not have to hold back, or stop pedaling to shift. It is designed to shift even under loads of up to 1000 watts. Futhermore, you can shift while coasting (and back pedaling). And even when standing still - the hub will complete the shift as soon as you start rolling. This all means faster, trouble-free shifting each time, over and over again.

What is the gear ratio?

The ratio is similar to what you'd find on a 2x-setup. The ratio is roughly equivalent to 53/36, 50/34 or 48/33 chainrings.

The hub has two speeds. In Direct Drive it is 1:1; meaning the cassette and hub have the same speed. In Under Drive it has a ratio of 0,686, which means that for each revolution on the cassette, the wheel rotates 0,686 revolutions. We call this 0.7. Under Drive effectively replaces the smaller chainring on a regular 2x-crankset.

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