"Why Shimano’s three-pulley rear derailleur could revolutionise drivetrain design"

[guerney]

"Could this be a new XTR rear derailleur? "

Why Shimano’s three-pulley rear derailleur could revolutionise drivetrain design

Could this be a new XTR rear derailleur?

www.bikeradar.com

 

[flecc]

Hurrah!

Even more drag and friction, more pulleys to clog up with dirt when mountain biking, chain cleaning an even bigger nightmare.
.

 

[AndyBike]

I'll warrant this 'acts as tensioner' will decrease its lifespan.

 

[Woosh]

It improves contact with the sprockets for a marginal extra cost. I can see its usefulness on commuters ebikes.

 

[StuartsProjects]

When Shimano pay one of the Tour teams enough to use this wonder device, they will become very popular amongt the Lycra clad.

Suspect that is the objective.