So I've talked to several folks of the last couple of years and have tried to sort through the BS. Here's what I've got: 1. Cush hub protects the transmission from torque during hard acceleration and hard downshifting on tarmac. 2. Some say not necessary for knobbies or supermoto applications some say it is essential for street riding. What's the inmate advice? I ride 20 road/80 off-road and have Dunlop 908RR tires f/r. Opinions, upsides/downsides, supermoto or knobbies, etc. Thanks for comments!