Originally Posted by
iamarapgod
Just adjust your bb like a normal person. I have never heard of somebody walking in their lbs and saying" I need spacers" and the clerk saying "right here man" I cannot condone the use od these if they do exsist. You need to be torqued down on the hub, anything else is a washer in the way. But what do I know?
Most people don't have adjustable BB's. These spacers are available because they are the same diameter as BB spacers, which are often needed for adjusting chainline the other direction (outboard at the BB). Putting them under a fixed cog isn't the greatest idea, but it's necessary for some applications and as long as you don't skid and all of that it's fine.