Parts & Maintenance

The best starting point is identifying what is worn, damaged, or underperforming on your current setup. Common items that need regular replacement include drivetrain components like chains, cassettes, and chainrings, as well as smaller parts like skewers and frame protection. If you are unsure, a quick inspection at your local 99 Bikes store can help you identify what needs attention before you buy.

Chains, cassettes, and chainrings are the most frequently replaced drivetrain components, as they wear together over time through regular use. Signs that your drivetrain needs attention include skipping gears, chain stretch, or difficulty shifting smoothly. Replacing components in a timely manner helps prevent accelerated wear on other parts of the drivetrain, saving you money in the long run.

Compatibility depends on several factors including your bike's groupset brand, the number of speeds your drivetrain runs, and your frame's dropout or axle standard. Checking your existing components for brand and speed markings is a good first step before purchasing replacements. If you are unsure, bringing your bike in or noting down your current groupset details will help you find the right match.

Frame protection refers to adhesive films, guards, or wraps applied to high-wear areas of your frame to prevent scratches, cable rub, and damage from trail debris. It is particularly useful on areas like the chainstay, top tube, and around cable routing points. While it is not essential, it is a low-cost way to preserve the condition and resale value of your bike over time.

Skewers need to match your wheel's axle type and your frame's dropout style, so it is important to check compatibility before purchasing. Common types include quick-release skewers and thru-axles, with thru-axles generally offering greater stiffness and security for modern bikes. Choosing the wrong skewer type can affect both safety and performance, so getting the right fit matters even though skewers