Here is it goes:
UPZ boots: one of the most comfortable boots I have ridden to date with the standard tongues, flexible enough for freecarving my small Virus Boards (Black Death, former 3 Cyborgs, Nightmare and yet to come a Interceptor Evo + +). I ride these boots with a semi hard foamed liner from Boot Doc. What I find uncomfortable about the boots: To stepin and out due may be to my high footarch. I al;so have thias with my Deeluxe T700. I hope this problem will be partly solved by the new generation UPZ RC10 because of the new tongue construction and the new buckles that you set vertically open by a new spring mechanism. I ride the UPZ RC10 also with a custom spring machanism bought from a italian guy. Boots have more travel and are way more dynamic cause of the longer spring which helps me a lot in my carving technique (more control in lay downs). I ride thse boards with Bomber stepins. Boots that fit this best boots also which I have ridden: Raichle AF 600.
My Deeluxe T700 with custom foamed (hard foam) full leather Strolz liner. I ride these boots in the most upward position. The stiffer the boot the better. I use these boots for my race boards (Jasey Jay slalom) with plates where I feel I have more control with a stiff boot. I ride the boards in a more upward style. Have ridden the boots with a bomber BTS, but I couldn't adapt enough with this spring system. Without I feel, I have more control and direct power with my board. But may be another snowboarder has it just the other way around. It's just me. I ride these boards with standard F2 |CNC bindings.
Both boots have the 'problem' that the buckles touch each other when you push the boot. But I think, well a hardboot is hard to make without touching those buckles.