IGH Internally Geared Hub and Pedal Steer

[chrisblessing]

I was just reading an article (http://www.bikeradar.com/gear/category/bikes/recumbent/product/review-mike-burrows-ratracer-sl-12572/) in which the author states that " Torque-steer (where the rider's pedal inputs affect the steering) can be designed out by using a hub gear. Derailleur systems induce torque steer, because the chain line is able to move out of parallel to the steering axis, making torque steer worse in some gears..."

I wonder if anyone has a response to this? I feel that since the addition of the Nuvinci IGH, pedal steer is noticeably less on my conversion, and that handling and steering seems more like that of my RWD recumbents. Never having mastered the "hands free" approach, I can't use this as a measure.

Thoughts?

 

[Charles.Plager]

Huh.
I had no idea bike radar

Huh.

I had no idea bike radar reviewed recumbents. Moving on...

The recumbent they review is a FBB FWD. I think having a moving bottom bracket makes for more pedal steer than other bikes.

That being said, I can see how chain line might affect this somewhat. I wouldn't expect it to be a large difference, but I've got not much behind that guess.

 

[Shahmatt]

Are you still using the

Are you still using the Patterson Metro on the front?

I understand that the Patterson is about 1.7kgs.

The more weighted front should require more force to move the steering system off axis. So it may provide more stability.

Maybe this is the reason?

 

[John Tolhurst]

A nonsense concept, rapidly

A nonsense concept, rapidly debunked by a spot of static analysis. How the structure is implemented between pedal and steering axis is of no consequence.

 

[chrisblessing]

front weight

Thanks for the input everybody. Funny the information out there regarding FWD/MBB or FBB.

Shahmatt, you could be right. Add the PM to the Nuvinci and I've got a weighty front end. Haven't spun the wheel since I installed it.