The Dromida Motor Rock Rider 21T is a brushed 540-size electric motor designed as a factory replacement for the Backbone platform. The 21-turn wind delivers a balance of torque and efficiency suited to rock crawling and trail driving applications. It connects via standard wire leads with spade-style terminals and mounts using the common 540 can format shared across a wide range of 1:10 scale vehicles. Features: 21-turn brushed motor 540-size can fits standard 1:10 motor mounts Spade terminal wire leads for easy connection Designed for the Dromida Backbone platform 7/7/26 cs