Retrofitting drive hubs: 3X3 launches retrofit programme for end customers

A bicycle is never scrap.

At least not as long as the frame, wheels and other components are still in good condition. With a new online sales channel, 3X3 is now making it possible to retrofit existing bicycles and e-bikes with a gear hub in a targeted manner. Since 17 September 2026, selected retrofit components and spare parts for the 3X3 Nine and Six have been available directly via Elektrofahrrad24.

Until now, the Nine has mainly been found as an OEM component in complete bikes. That is now set to change. End customers can select and order suitable parts online without necessarily having to go through a specialist retailer as a first step. However, technical checks remain important: the mounting width, axle standard, brake disc, drivetrain and torque support must be compatible with the bike in question.

3x3 Nine and Six at a glance

The 3X3 Nine offers nine gears and a gear ratio range of 554 per cent. It is designed for a maximum input torque of 250 Nm and is approved for a system weight of up to 250 kilograms. This makes it suitable for powerful e-bike drives, cargo bikes and more demanding applications.

The 3X3 Six has six gears and covers a gear ratio range of 292 per cent. Its maximum input torque is 160 Nm, and it is also approved for a system weight of up to 250 kilograms. It is therefore aimed more at city bikes, commuting and moderate tours.

Both hubs are sealed and protected against external influences. The Nine uses grease lubrication; there is no need for regular oil changes. In our Review of the 3X3 Nine The hub proved to be particularly useful for everyday use. Changing gears whilst stationary is practical in city traffic, and the wide gear range extends its versatility. At the same time, the Nine remains heavier and more complex in design than a traditional derailleur system.

3x3 retrofit kits: What you get, what’s still missing

Both gear hubs are available as mechanical versions with a twist-grip shifter or as electronic versions with a wireless thumb shifter. The latter is compatible with the Bosch Smart System for e-bikes. Prices for the retrofit kits start at €699.90 for the mechanical ‘Six’ and €899.90 for the 9-speed ‘Nine’ gear system. The electronic versions are each just under €300 more expensive.

Before purchasing, you must check the axle standard and the brake disc mount of the bike to be upgraded and take these into account when placing your order. The hubs are available for 135 mm quick-release axles and 142 or 148 mm through-axles, as well as for International Standard or Postmount brake caliper mounts (IS2000, PM160 or PM180).

The package includes everything needed for the conversion – from the gear hub and the matching brake disc right through to the gear lever – except for a new chain. Is there a catch? Well, perhaps the biggest hurdle is that, unfortunately, the bike is still not rideable when the parcel arrives at your home. The gear hub still needs to be fitted with rims and spokes to create a complete wheel.

Spare parts to extend the life of your bike

The second part of the programme is at least as important as retrofitting. Spare parts ensure that an entire system – or even a whole bicycle – does not have to be replaced straight away if a single component wears out or is damaged.

This is precisely where the importance of the circular economy lies. A durable product requires not only robust technology, but also a realistic possibility of repair. Direct access to spare parts can help workshops and owners keep existing bikes on the road for longer.

It is currently considered certain that the spare parts will remain available in the long term. 3X3 manufactures the hubs in Adelmannsfelden, Baden-Württemberg. During our on-site visit to the company It became clear just how much the brand relies on its own manufacturing expertise and short supply chains. The hub consists of around 100 individual parts, a large proportion of which are produced and assembled at the company’s own factory.

Retrofitting requires technical care

The new way to order 3x3 retrofit kits and spare parts makes it easier to upgrade your own bike at home with a high-quality gear hub. However, the parcel does not arrive as a ready-made wheel; you’ll need to assemble it yourself. For e-bikes, there’s an additional point to note: at present, the gear control system is only compatible with the Bosch Smart Drive system.

If you bear these points in mind, Nine and Six offer two options for specifically upgrading an existing bike. We believe this represents sensible progress: less complete replacement, more repairs and a longer life for the bike. Ride on!

What do you think – would you like to upgrade your bike with a gear hub? How important do you think the circular economy is? How important is locally produced technology to you? Are you prepared to pay higher prices for this if necessary? Let us know in the comments – we look forward to your feedback!