“Understanding Cross-Chaining: Impact on Drivetrain Efficiency and Wear with Shimano and SRAM”

Cross-chaining is a term that many cyclists may have heard but may not fully understand. It refers to shifting into gears that cause excessive wear on your bike’s drivetrain and decrease efficiency. Shimano and SRAM, two of the leading manufacturers of bike drivetrains, have differing opinions on the issue. This article will delve into the details of cross-chaining, how it affects your bike, and what Shimano and SRAM recommend for avoiding damage to your precious ride.


Most bicycles come with multiple gears to support riders in different terrains and scenarios. While all gears are technically available, some gear combinations should be avoided to prevent cross-chaining, which occurs when the chain is pushed into extreme angles. This reduces the efficiency of the chain, increases wear and tear on the drivetrain, and can harm shifting performance. The concept of chainline, which refers to the straightness of the chain, plays a crucial role in cross-chaining. For instance, a 2x drivetrain should avoid the smallest cassette sprocket and the smallest chainring or the largest cassette sprocket and the largest chainring. SRAM advises that a 2x drivetrain should avoid the small-small combination, while Shimano recommends a certain position for the rear derailleurs but acknowledges the higher friction during cross-chaining. Cross-chaining is less of an issue on 1x drivetrains. However, riders should aim for an optimal chainline for drivetrain efficiency, which is usually achieved through the use of cogs towards the middle of the cassette, resulting in a straighter chainline that is more efficient and quieter. Cross-chaining can lead to increased wear and longer chain length, noisy chain and cage plate rubbing, power loss and inefficiency, and potential chain dropping. To avoid cross-chaining, riders can change chainrings or use electronic groupset features that prevent cross-chaining. In general, occasional cross-chaining is not a problem, but it should be avoided when possible.


Overall, understanding cross-chaining is essential for every cyclist because it can significantly affect the performance and longevity of your drivetrain components. While there are pros and cons to both Shimano and SRAM drivetrains, both companies have taken steps to improve cross-chaining performance and reduce wear on components. By following best practices when shifting gears and maintaining your bike regularly, you can ensure that your drivetrain operates smoothly and efficiently for many miles to come. So, whether you’re a seasoned cycling veteran or just starting out, take the time to understand cross-chaining so that you can get the most out of your bike and enjoy your rides to the fullest.