Bike Sprockets

Your drivetrain’s precision depends on the sprockets on the rear wheel. A worn cassette sprocket becomes noticeable quickly – shifting becomes rough, and the chain starts to skip.

With the right replacement sprocket or sprocket set, your drivetrain runs smoothly again, whether on a cassette, a singlespeed setup, or an internal gear hub. At BIKE24, you’ll find individual sprockets and sprocket sets for common Shimano and SRAM cassettes, singlespeed kits for minimalist setups, sprockets for internal gear hubs, and matching accessories such as lockrings and spacers. This gets your drivetrain running smoothly again – or lets you fine-tune your gear range for better performance.

Want easier climbing or more speed on the flats? The sprocket combination on your cassette determines how your drivetrain responds to the terrain.

• Precise replacement: Swap only the worn sprocket – this saves money and preserves the remaining cogs in your cassette.
• Adjust your gearing: Choose a different sprocket size to tailor your drivetrain to your terrain.
• Wide selection: We stock sprockets for Shimano, SRAM, and Campagnolo, plus cogs for hub gears and singlespeed systems.

Cassette replacement parts, singlespeed cogs, or hub gear sprockets – bicycle sprockets include a range of components with different requirements. First, decide whether you need a spare for an existing cassette, are planning a singlespeed project, or need a replacement cog for your hub gear. In addition to the sprocket itself, small parts such as lockrings and spacers also play a role. Understanding the different types helps you narrow down the right spare part or upgrade.

If only one cog on your bike is worn, you don’t need to replace the entire cassette. Shimano in particular offers individual sprockets and replacement sprocket sets for many of its groupsets. Check compatibility with your cassette and make sure it matches your freehub standard.

For a minimalist single-speed drivetrain, you need a single cog on the freehub – plus the right spacers for proper alignment. Complete singlespeed kits include a sprocket, spacers, and a lockring in one set and are available for different freehub standards. Threaded cogs with integrated freewheels and fixed track sprockets for fixie and track builds are also part of typical singlespeed setups. They make the switch to singlespeed simple.

Bikes and e-bikes with internal gear hubs use a single sprocket on the rear wheel, mounted directly to the hub and usually secured with a circlip. The number of teeth defines the base gear ratio within which the hub operates. Shimano offers matching sprockets for Alfine and Nexus hubs in various sizes, while Rohloff provides compatible sprockets for the Speedhub 500/14.

A new rear sprocket must match your existing drivetrain – otherwise the chain won’t shift cleanly or the sprocket won’t fit the freehub. Before ordering, it’s worth checking a few key points. If you want to change your gear range, take a look at your derailleur’s maximum sprocket size and total capacity. If you’re simply replacing a worn sprocket, the best reference is your current groupset.

Sometimes a single part is all it takes to get your drivetrain running smoothly and quietly again. You’ll find exactly that here – from individual replacement sprockets to complete singlespeed kits, lockrings, and spacers, all from top brands and ready to ship. Thanks to our fast shipping, your new part will be on your bike in time for your next ride. Not sure how to replace your sprocket? Our cassette replacement guide walks you through it step by step. Looking to replace the entire cassette instead? You’ll also find bike cassettes for all common groupsets and freehub standards in our shop.