Originally Posted by
maddog34
Why would there only be one half of that pivot system shown on that drawing? and i've also never seen that spacer on a bike... ever. Will wonders never cease... Still baffled by the use of 1/2 of a pivot mount... weird and useless. Some engineer is probably very proud of that drawing... half a pivot mount... hmmmm.......

liking the spacer.... and the half pivot could be to allow for the bias on the spacer...I'm sure the engineer would have an as useless reason for that totally useless addition....
It's a very commonly used adapter on mountain bikes.
The reason spherical washers are used....