In reply to Nordie_matt:
> It's a bit strange that they say crampon compatible but don't provide the b rating if the boot.
The B/C rating was invented as rough guide by a British mountain guide. I think the chap, Brian Hall, was working for Berghaus at the time whilst Berghaus still did Scarpa boots in the UK, as the system was used with Scarpas first.
Anyway, its not an international system and its only meant as general guide. Modern boots and modern crampons have change also, so I guess its even more of an over-generalisation now than in the mid-90s when Brian came up with the idea.