went to put an o-ring type replacement chain on my new bike, as I've read its better to do it right away and save sprocket wear. Local shop sent me home with a DID ERT Gold, NON o-ring, which I didn't realize until it was on the bike. Great, took it off, went back, came back to shop with a Regina RK XW ring Gold 520. Asked guys who work there if it will be too wide, rub the cases, etc. They said no, came home measured it, it was 1/4" wider than stock chain, WAY too wide! It would fit my 1000cc Speed Triple perfect! Bling! Bling! &%$#@!!? This apparantly simple 15minute mod has turned into a two day deal. Most of the kids who work at the shops I go to apparantly know less than me about chain types, if thats possible. Anyone have a specific model, and did you have to shim your countershaft sprocket?