[ QUOTE ] I want to start a compilation of various topics relevant to those who are building serious off road rigs. Lots of stuff is touched on here and there, but finding it and putting it all together can be a problem. Lets try to get some of this stuff grouped together in one post. This is one such attempt among several. Lets try to keep this very focused and tech rich. NO POST PADDING! If you don't have something to add, please don't post fluff like the typical "that's cool" or similar having adding nothing relevant to the discussion. [/ QUOTE ] Lets try to compile all the data on basic REAR link suspensions here. Lets talk about (and define clearly): 1) Conventional 4 link (triangulate upper - point on top of diff, parallel lower) 2) Double Triangulated 4 link, 3) Reverse 4 link (triangulated lower - point at chassis end, parallel upper) 4) Parallel 3 or 4 link and track bar 5) Wristed radius and track bar 6) Wishbone upper with parallel lower 7) Whatever I forgot… I can't tell you how many times I've heard people use the wrong (or ambiguous) terms when referring to a link suspension design. For instance, incorrectly calling a wishbone upper 4 link a "3 link". Lets establish definitions and stick to them so that we have a common vocabulary and frame of reference. Those with convenient access can post links to the "Link Calculator" spread sheets and web pages. Lets see if we can get all the basic "layman" descriptions of the various pieces in one place. Things like Roll Axis, Jacking, Torque reaction, "Instant Center", and Anti-Squat. Lets look at them (and describe how to find them!) for each of the primary link arrangements. Stull like what was found in "God of Suspensions" and other noise laden posts on PBB can be sifted out and focused on this thread. What are the bad characteristics of each? Things like jacking or binding and considerations/approaches to deal with them. What about good/bad habits of positive/flat/negative roll axis angle? What about good/bad characteristic and compromises of roll axis height? Good and bad of anti-squat? So, lets compare and contrast. Nothing but REAR suspension discussion on this thread. Lets keep this tightly focused and VERY tech rich. No post padding and no "that's cool" but otherwise empty posts PLEASE. <font color="red"> Let's keep this technical! Don't respond with "I know a guy who runs "X" and it works great, so that's what I would run" type of stuff. Tell me what you think is best and why. Know a guy who runs it is fine for a start, but tell me what makes it so great you would do the same thing… </font> I've got lots of thoughts on these I'll add as I get time, but I'm already running out of time starting these compilation posts.