Sorry if im being really dumb but I would like some help with the following questions ,first off I thought you might like to see my before after pics.
![](http://www.radbmx.co.uk/archive/albums/ee43/jp_rebel/sk2.jpg)
![](http://www.radbmx.co.uk/archive/albums/ee43/jp_rebel/skyw1.jpg)
Now does anyone know what the 2 knurled things that are sticking out either side of the freecoasterwheel?(see pic below).
![](http://www.radbmx.co.uk/archive/albums/ee43/jp_rebel/skyw2.jpg)
Also I need some new wheel/track nuts what TPI do I need.And what do the serial numbers pressed into the rims mean,the front has 1494426 and the back has 1491462.
Cheers.