Functionally

You can probably leave them alone unless they're showing signs of corrosion and you want to get some freshies in there

Length: 420mm

Other component compatibility: Should work on all 12 speed chains

TLD Flowline SE MIPS Helmet - XL-2XL - Radian Burgundy-Charcoal netsuite-webdata-created FunctionallyDETAILS Be sure to stay safe on your bike rides with the Flowline SE Helmet from Troy Lee Designs. This half shell helmet seamlessly combines safety, comfort and style. Enjoy reliable impact absorption and a breathable airflow system with the helmet's design. Plus, the easy to use magnetic buckle ensures a secure closure every time. Conquer the mountain bike trails, or city streets, with the Troy Lee Designs Flowline SE Helmet. SPECIFICATIONS 3 Way