Want to turn your Tamiya RC car into a serious off-road crawler or mini-tank? This TAMIYA Track Unit Set is the cool upgrade you're looking for. You get two complete track units (one for each side) that replace the standard wheels on compatible chassis. Each unit has three road wheels and a pivoting track roller arm for awesome grip and articulation over rough terrain. The kit even includes two types of track links you can choose from: standard links or more aggressive 'grouser' links for even better traction. It's designed to fit several popular Tamiya chassis platforms, including the TT-02 (note: for the TT-02 you'll also need a separately sold 16T/17T pinion gear set and a 35T motor like the CR-Tuned), the CC-01/CC-02 Land Cruiser chassis, the GF-01, and the WR-02. Installation requires some mechanical skill, but it's a fantastic way to completely change the look and capability of your RC vehicle. Imagine your buggy or truck now having tank-like tracks – it's a whole new level of fun for crawling over obstacles. A must-have for Tamiya builders who love to customize!