I quite often encounter gear cable housing, used on indexing systems, with the marking "SHIMANO SIS" This would lead one to believe that the housing is of the compressionless variety, which is required for correct operation of the indexing system. On inspection of the housing, it turns out to be spiral-wound.
Is this genuine Shimano housing? And, if it is, are Shimano saying spiral-wound housing is acceptable for indexing systems? I have read in a number of texts words such as "Do not use ordinary wound housing; use a housing such as Shimano SIS" This becomes all very confusing.
For what it's worth, the housing marked "SHIMANO SIS SP" is of the compressionless type.
Any ideas?
Is this genuine Shimano housing? And, if it is, are Shimano saying spiral-wound housing is acceptable for indexing systems? I have read in a number of texts words such as "Do not use ordinary wound housing; use a housing such as Shimano SIS" This becomes all very confusing.
For what it's worth, the housing marked "SHIMANO SIS SP" is of the compressionless type.
Any ideas?