Single-speed drivetrains put different demands on a chain than geared systems, and the SRAM PC-1 is built specifically for that job. The 1/8" width matches single-speed specific cogs and chainrings, and it is not intended for use on drivetrains designed for multi-speed 3/32" chains. The wider plates spread load across more material than the narrower chains that thread through cassette ramps and derailleur cages, which is what you want when every pedal stroke goes through a single cog without any tension device to absorb slack.

The nickel-plated steel construction enhances durability and helps prevent rust and corrosion, which extends the chain's lifespan on bikes that see wet weather or get locked up outside. That matters for the two ends of the single-speed market — track and fixed-gear bikes that live indoors between rides, and commuters and cruisers that sit in the elements. The plating handles both use cases without asking you to think about it.

Heat-treated pins and a two-piece snap-lock closing link round out the construction, and SRAM designed the chain with track, BMX, and single-speed mountain bike riders in mind. The snap-lock connector installs without a chain tool, though the two-post design takes a moment to figure out the first time — line up the two pins on one plate through the outer link holes, then press the matching plate on top until it seats.... Read More