Chains & Chain Guides

Chains are speed-specific, so you need to match the chain to the number of speeds in your drivetrain. For example, an 11-speed chain is designed to work with an 11-speed cassette and shifters. Always check your existing drivetrain setup before purchasing, and if you are unsure, bring your bike into a 99 Bikes store for advice.

Chains wear over time through a process called chain stretch, where the internal links gradually elongate and cause poor shifting and accelerated wear on your cassette and chainrings. A chain wear indicator tool is the most reliable way to check whether your chain needs replacing. Replacing a worn chain promptly is one of the most cost-effective ways to extend the life of your entire drivetrain.

A chain guide is a protective device that keeps your chain on the chainring during aggressive or technical riding, preventing it from dropping. They are most commonly used on mountain bikes, particularly those ridden on rough or steep terrain where chain drops are more likely. If you ride on smooth roads or casual trails, a chain guide is generally not necessary, but for off-road and enduro-style riding it can save significant frustration.

Yes, chains are generally available across entry-level, mid-range, and performance tiers. Higher-end chains are typically lighter, more durable, and engineered for smoother, more precise shifting, which can make a noticeable difference for performance riders. For everyday commuters or casual riders, a mid-range chain will usually provide excellent value and longevity without the premium price tag. Better chains also tend to feature improved surface treatments or coatings that resist corrosion and reduce friction, helping them stay cleaner and last longer between replacements. Ultimately, matching the chain quality to your drivetrain level makes the most sense, pairing a budget chain with a high-end groupset can compromise shifting performance, while spending top dollar on a chain for a basic drivetrain offers little practical benefit.