Ok I am back

To be honest dont take mtbr as gospel. Also lifted from there,
Submitted by Matt Wenham a cross-country rider from West Yorkshire, UK
Date Reviewed: May 6, 1998
Bottom Line:
I use the SD 2.0 (not the L version) for the U-brake on the back of my GT, and for a Dia-Compe 737 up front. There is *just* enough pull to use these levers with V-brakes when they're on maximum pull, as long as you don't mind them a bit squishy. More squishy equals more control but closer pad clearance. I can live with it, but may upgrade to 2.0L later. The U-brake works fine with minimum pull, any more and there's not enough control for me.
I still maintain that you need the L version. You can pick them up for less than a tenner. If they work better great, if not, flog them on. You may find they work better and in a few months some red versions may crop up