Advantages

The advanced belt drive not only replaces the chain, but it also simplifies life considerably with a suitable shifting system.

The advanced belt drive is light, safe, stable, simple and functional and requires no preload in contrast to other toothed belt drives. The advanced belt drive is intended to be used where the toothed belt system can tap the full potential. Thus far, it has been optimised for Nuvinci, Shimano Alfine and Nexus gear as well as Schlumpf gears and the resulting possible combinations.
The Schlumpf gears and the advanced belt drive form the ideal and harmonious combination for a sporty and functional every day use bicycle. Other systems are continually being developed and the options will be expanded in the near future.

 

What are the technical features of the advanced belt drive?

The tooth washer, which is milled as a single piece from high-strength aircraft aluminium 7075 of steel 1.4305, ensures precision for an absolutely quiet ride as well as a long service life for the belt. The optimised dirt expulsion and dual-sided circular flanged wheel guarantee optimal guidance and protect the belt. Your safety is also important to us. A primary gear ratio of less than 2.5 allows for use of a toothed belt with a 14mm tooth separation. The large teeth and good form fit of the tooth washer prevent skipping or lateral jumping even without preload. The advantage to the manufacturer is a simplified requirement with regard to precision and stiffness; for consumers, the advantage is improved movement action of the mechanical parts involved. An investment that pays for itself after only a few kilometres due to the long service life and low maintenance of the system.

Advantages

Advanced Belt Drive Ohter belt systems Chain
+ no preload - high preload + no preload
+ normal bearing load - higher bearing load + normal bearing load
+ no sagging + no sagging - strong sagging
+ more than 20'000 km + up to 20'000 km - around 2'000 km
+ easy to remove wheels - difficult to remove wheels + easy to remove wheels
+ no chain oil + no chain oil - chain oil
+ no dirty pants + no dirty pants - dirty pants
+ almost no noise + almost no noise - audible noise

- compatible with nearly all gear shifts

- compatible with nearly all gear shifts

+ compatible with all switching systems

+ low maintenance + low maintenance - intensive maintenance
+ no lateral jumping    
+ no skipping due to optimised tooth profile    
+ automatic dirt expulsion    
+ no rust + no rust - prone to rust
+ low weight + low weight - higher weight