I had one on my fronts but before that i went through 3 sets of tires in 9 months. YIKES. They help out. I don't know jack about the ones you listed and I think its also BS to charge $22 to ship them. Ebay actually has a rule about excessive S/H charges. You can report it to them. I have been buying and selling on ebay since 10/99 and have a 300 positive feedback rating. I also remember my camber kit (which i bought from ebay) was $8 to ship. Look around....