OK im away from home right now and even if i was there i wouldnt have any clue how to measure this. I need to know the knurl diameter of our hub studs or the diameter of the hole in our hubs. I am going to order some longer MOROSO brand hub studs and get some 25. mm AL spacers from the local wheels shop. Also does anyone have any experience with this brand?

 

I measure 12.93 mm or 0.509 inches for the knurl daimeter with a knurl length of 0.315 inches. thread pitch is 12mmx1.250. They must be grade 8 SAE or grade 10.9 metric or better bolt.

 

http://www.fc3spro.com/TECH/MODS/RT/lstuds.htm

 

I dunno about the Moroso brand wheel studs, but we use the ARP ones with no problems with the knurl.


-Ted