After installation, pair the components if required, install the compatible cassette and chain, and adjust the derailleur according to the manufacturer's instructions. Fine adjustment may be required to achieve smooth and accurate shifting.

Firmware updates can usually be completed through the compatible APP. Make sure the battery level is sufficient and keep your device connected during the update. Do not interrupt the update process.

Before purchasing, please check your bike type, frame compatibility, brake type, cassette, freehub body, and axle standard. You can also send us your bike model and current drivetrain specifications for a compatibility check.

eR7 and eRX are mainly designed for road bikes. GRT is designed for gravel and all-road riding. eGR is designed for gravel and off-road applications. Please choose the model based on your bike type, riding style, and required drivetrain configuration.

Wireless systems communicate between components without shift cables, providing a cleaner setup. Semi-wireless systems may use wireless communication between selected components while other parts remain connected by wires. The exact configuration depends on the specific model.

Please use the official APP specified for your L-TWOO groupset model. The APP can be used for system connection, firmware updates, button configuration, and other supported settings. Connection instructions may vary depending on the model.

Yes. All products are genuine and sourced directly from manufacturers or authorized suppliers.

Yes. Eligible products are covered by a 1-year warranty against manufacturing defects.

For selected countries and shipping methods, DDP (Delivered Duty Paid) service is available. Please contact us before ordering if you have questions about taxes in your country.

Professional installation is recommended, especially for hydraulic brake systems and electronic shifting systems. Correct installation and adjustment can help ensure proper shifting and braking performance.

Please use the brake fluid specified by L-TWOO for your particular model. Do not mix different types of brake fluid. If you are unsure, contact us with your exact groupset model before adding or replacing brake fluid.

Thru axle compatibility depends on your bike frame and wheel standard. Please confirm your frame's front and rear axle specifications before purchasing.

Cassette compatibility depends on the specific L-TWOO groupset model, speed, derailleur capacity, and freehub body. Please check the product specifications or contact us with your current cassette and wheel hub information before purchasing.

Battery life depends on the model, riding frequency, and usage conditions. Please charge the components using the recommended charging method and cable. Avoid using damaged chargers or charging equipment.

First, check the battery level, component connection, firmware version, derailleur alignment, and chain and cassette compatibility. If the problem continues, contact us with your order number, product model, and a short video showing the issue so we can assist you.