Originally Posted by
tendency
Hmmm, well, the vendor I purchased it from says it is compressionless however according to Shimano's site it looks like some sort of proprietary construct as it doesnt look like compression housing but not exactly like the compressionless ones I've seen.
IIRC Shimano, at least at one time, called their brake casing compressionless because it used a spiral with a rectangular cross section, the flat sides will better support the compressive forces that a spiral made from oval or round section. Andy