Let's see how many comments i can respond to.... its the original shock, maxed out on the preload - not a 2UP spring. The stock spring/shock just won't cut it for the load and range of motion - guess i should lay off the donuts??? Yes the tube under the adapter is a bit large 1" tall x 2" wide (stock material they had on hand ) cutting into travel range. And nope not a Rally, went for the 900 and bought all the bolt ons to save labor $$$ installing myself. Saving for Elkas all around. they match the spring/shock for the weight and style of riding you like - will call and explain my shortened range of motion to limit the travel. For what its worth i've generated lots of designs utilizing springs of all nature over the years (~40) for work utilizing springs of all nature, compression, extension, torque, belleville - who can tell me what a belleville is? Most of the new hires i work with don't know what it is.