SURRON LIGHT BEE LBX LB1 L1E PIVOT SHAFT STAINLESS STEEL SPECIAL NUT – M10/1.0 stainless steel, 4 point castellated nut for your LIGHT BEE pivot shaft / swing arm axle. For use with the special 4 point socket tool. High quality performance part and ready to fit.
Part No. RM B2-013-10-F0
It is very easy to lose this part when out on the trail so be safe and get one of these as a spare especially if you are competing or using off road.