Stock Spring Rates?

[geekdaddy]

Do you know what the spring rates are on them? It could be a good point of reference for Ed's goal of this thread.

They're made by Apex and I purchased them at Eurosport UK. But the rates aren't quoted
http://www.eurosport-uk.net/shop/index.php?main_page=product_info&cPath=1_11&products_id=595

Looks like craig also used them and discussed in his video here: