In answer to the question of whether or not sram and Shimano 12 speed wide range are cross compatible, prompted by Ratio Tech saying they were different, when used with their products. Responses from 3 different guys who are pretty onto it. From the antipodes. YMMV.
They work fine together. The best performing sram drivetrains run the Shimano cassette and chain, the way they shift is awesome.
The hot set up at the moment is SRAM wireless shifter and mech paired with a shimano cluster, chain and ring.
My favourite combo is XO cassette, chain, and shifter, with a shimano mech
I guess that makes some sense, as the dangler cage plates travel in an arc. They’d need more cable pull to result in the same horizontal cog-to-cog movement. Probably some stuff going on with how the cable is anchored too?
OK this makes sense to me on the last shift but not the first. Does it mean you need 1mm of slack in the cable to get the shift right? I always set the limit then pull the cable taught and then adjust tension, it sounds like this would result in a sloppy shift
Another thing is that since the pull is nonlinear, the “average” pull increases as you add more gears. If you calculate the pull for an additional click you get an average of 3.6mm pull for 11 speed, but the shifts would be identical.
Note that “average” is the linear fit: total pull distance from cog 2 to cog n-1 divided by n-3.
Updated with the XT 8000. Though it pulls about the same average cable, it’s much less progressive. It has metal internals, so I wonder if some of the extra progressiveness in the Zee is actually flex of the plastic carrier winding up or deflecting.