Thread size for spikes on Von Schweikert VR 4 jrs

I am buying a pair of Von Schweikert VR 4 jrs and have heard that the floor spikes are not that great. I am going to purchase some new ones. Anyone know the thread size? Also any suggestions on which ones to get?

Bass Unit Spike thread: M8 - 1.25
Try Dayton spikes from Parts Express. Excellent brass spikes and inexpensive: about $20/pack of four.
Also, get the VonSchweikert Special from Herbies Audio for replacing the upper module spikes with his Big Fat Black Dots - they're a big improvrment over the stock mini-spikes supplied and yield greater clarity. Email me for more VR4JR DYI tweaks.
Check here.