There are different grades of Stainless Steel, the most common is 304. Which suprisingly - rusts relatively quickly. The better option is 316, which doesnt rust very easily at all BUT, who can tell the difference??? AND, when it coming from China, who is testing it to make sure it has the correct chemical composition... (304 stainless bolts have a A4 stamped on them, where 316 bolts will have A2 stamped on them) Remember Aluminium bolts are NOT strong, and should not be used in high stress applications (like brakes, handlebar, stem etc), rather go for Titanium (at a premium!) Something to take into account is: If you have a mild steel frame, and put stainless bolts through it, you have a "battery" Remember school science - Two dissimilar metal joined together in the presence of an electrolyte (salty sea air), will result in a current between them. This small electric current results in corrosion!
