Varia™ RTL515 Swagman The RD-RX812 rear derailleur is

The RD-RX812 rear derailleur is compatible with mtb cassettes with a 42T low sprocket max

CO2 cartridges

Silent and stable for technical trail riding

An extra strap is provided

Varia™ RTL515 Swagman The RD-RX812 rear derailleur isThis rearview radar with tail light pairs with your Edge bike computer or compatible smartphone to alert you of vehicles approaching from behind. Reliable rearview radar lets you ride like you know whats coming. One radar. Multiple display options. Pair it with your compatible Garmin device, your phone or both. The Varia app has you covered if youre using your phone as a primary or backup display. Shine brighter. Daylight visibility lets approaching