"Treads" commonly found on tanks. Yes - you could build it yourself using individual components, or avoid the hassle and purchase a complete set! These sets include all the components necessary to make a complete track mechanism: Tracks, Drive Hubs, and Idler Wheels. New: J5 Tracks (deluxe), and J5 Tracks (standard.) J5 Tracks (deluxe) J5 Tracks (standard) Tank Bot Treads $24.99 Tank, Track, & Wheel Set $17.99 Small Track Set $15.99 Large Track Set (22") $49.99 Large Track Set (44") (out of stock, sorry) $79.99 Copyright © 2003-2008 E-Clec-Tech. All rights reserved. All other materials and logos are copyrighted by their respective owners, or companies.