Texfly,
The Spey (Two Handed) rods do not follow the AFTMA line weight standards for single handed rods.
Here is a chart with the AFFTA 2004/2005 Spey line weights
http://www.affta.com/media/downloads...ne_weights.pdf
Normally when a short DH rod is labeled as say 5wt, the correct loading with a single handed line is approx. +2 line sizes larger.
Regards,
FK