Scythe trucks are still rkps, meaning that the axle is behind the bushing seat and the pivot axis meets the kingpin(s) in a perfectly perpendicular way, defining a clear plane for the bushings to sit parallel at. The thing with these is that instead of having a pivot and a kingping it has a "weird mixture" of both...
By pure kinematics, two coplanar spherical joints will only leave freedom of motion for rotation to happen, and the axis of rotation is defined by the line that goes from the center of one to the other. Meaning that the scythe trucks create a very effective "virtual" pivot axis without what we (skaters) understand as a traditional pivot. This is also very effective in reducing slop and undesired torsional forces, since such system not only is very solid but also "self aligns", allowing for a highly efficient application of torque. Under your feet this results in a very smooth, progressive and "easy" range of motion that distributes forces more equally through its entire structure, this is why they feel so good sideways too. My point here is that both scythe kingpings hold the bushings and split the usual "pivot" work while also being higly efficient and precise, which gives a unique turny feeling.
The other weird tech that contributes to its high turn ability is the fact that both bushings are roadside, so there is no bushing compression happening because of your weight (until you turn). Meaning that there is no precompression except the one you manually adjust by tightening the kingpin bolt... So you can basically adjust the force needed to start turning the truck quite effectively, I don't know how much this affects actual riding performance but that's its mechanical effects.
The most notable consequence of this system (at least for me) is that there is no vertical dampening, creating a very "raw" feeling of the center of the truck and the pavement, sooo you can reaaally feel the truck under your feet, maybe enhancing the "holy sh*t this turns a lot" feeling. This happens to all trucks with sphericals, but specially on those where the hanger is directly held by it without any easily compressible material between the articulation and your feet, like when the spherical is used on the pivot. This is the so-called metal-on-metal feeling.
Lastly, Schythe uses some other more standard strategies to optimize turnability, such as very narrow hangers, open bushing seats and high rake.
I tried them on a friend setup and spent a good amount of time geeking on them , but I haven't done any proper setup testing to guide you through bushing configuration. I don't even fully understand the difference between changing the front or rear (upper and lower (?)) bushings. I do think that this design is cool and functional, even though it may be a bit maintenance heavy.
