By request of a customer with a balanceproblem Altena-bike developed the 'Opus-3' module. For anyone who needs an adjustment for riding a bike the Opus-3 is the perfect solution. Opus-3 is a complete module with two wheels that is mounted on the place of the backwheel. Your bike becomes a trike! Most important is that you can keep your own bike, nothing is ruined when installing the module and it can be build back to the original whenever wanted.

How it works:

• take away the backwheel
• fix the Opus-3 to the pads of the backwheel-hub
• fix two rods under the seat-post for stability
• re-arrange the cables and chain and the bike is ready to ride

The whole operation can be done by any qualified technician. The unit is made of stainless steel so will fit any bike. 

Click to see a the Opus-3 in action!

The system is made in stainless steel, complete with 20"wheels, disc brakes and stabilizer rods. The Opus-3 can be used on all bikes with or without E-assistance. For specific questions don't hesitate to call or mail us.

Prices

Standard bikes

with nexus hub: standard Opus-3

when using the original hub           € 1000

when using a new nexus hub        € 1100

with derailleur: standard Opus 3

when using the original hub           € 1000

when using a new hub                     € 1100

E-bike

E-motor in frontwheel or under cranckset: same prices and possibilities as mentioned above

E-motor in backwheel (usually with derailleur)   € 1300

In order to supply the right kit, we need to know if the bike you want to change to a trike has 26"or 28" wheels.

Click here to see a presentation.

On the pictures below a selection of the bikes that were succesfully transformed to trikes