Surly Stainless Steel Chainring

No ramps or shift gates, ideal for single speed but can be used with chains up to 9 speed, just expect slower shifting than a ramped chainring. 

Nominally 3/32", functions fine with 1/8" chains. Surly rings paired with 9 speed chains will have a tight fit.

No compatibility with 10 or more speed drivetrains.

Made from 304 Stainless Steel, these are the most durable chainrings we know of, especially for winter cycling as they also rust and corrosion resistant. 

Stainless Steel is a valuable resource and you will notice the price of these rings varies widely depending on the size, as this dictates how much material is used.