This is what the site says......
Why did you call this sprocket Supersprox - stealth?
Ste = steel (for the teeth)
AL = Aluminium (for the middle part)
T = Teeth (Supersprox new tooth design)
H = High performance
***Note in USA we have called the sprocket Tri-Metal for legal reasons**
In every case you will see our company name on the sprocket - Supersprox. That name is always a sign of quality.
European patent application number: 03792104.6, PCT #WO2004018902
USA patent number to be announced.
Notice any particularly British spellings??