-
This. Powertorque is my least favourite system. I went to a demo session at Chicken Cycle (distro) and they were saying Citroen own the rights to the Ultra Torque linkage and they have to pay a license fee to use it. Hence Powertorque is their cheapo version.
tallsam-
Strange, I was sure hirth linkages on bicycles were licensed by lightening, I wonder if @mdcc_tester can shine any light on the matter?
-
they were saying Citroen own the rights to the Ultra Torque linkage
Seems unlikely, Andre Citroen died the same year as Albert Hirth :)
The reason why PT is much cheaper than UT has nothing to do with patent fees and everything to do with cost of manufacture. Straight splines are really cheap to make, Hirth couplings are really expensive. That's why you see splines on automobiles where the fact that they are bulky, heavy and imprecise is easily outweighed by how cheap they are, and Hirth couplings in aviation gas turbines, where small radial dimension, light weight and tight control of runout are critical.
deleted
gbj_tester
So nice.
But also, Campagnolo y u still powertorque?