been thinking about this for a while and finally tried it. i bought a set of road bike sugino maxy cranks of ebay for £15, the kind with the built in chainwheel and i made sure the bcd was 110. it was a 52 tooth ring and it also had a 40 tooth ring bolted to it with sugino bolts. here's what i did.
the cranks before.
![](http://www.radbmx.co.uk/archive/albums/n203/john4130/sugino1.jpg)
bolted on a sugino spider to mark it
![](http://www.radbmx.co.uk/archive/albums/n203/john4130/sugino2.jpg)
the lines to cut to
![](http://www.radbmx.co.uk/archive/albums/n203/john4130/sugino3.jpg)
a dremel and 20 minutes later
![](http://www.radbmx.co.uk/archive/albums/n203/john4130/sugino4.jpg)
the piece you cut off makes a nice ninja throwing star
![](http://www.radbmx.co.uk/archive/albums/n203/john4130/sugino5.jpg)
going to polish then paint them candy red, should look nice and cheap too.