Ready to upgrade the performance and look of your TRX4M or other 1/18 scale crawler? This set of four aluminum alloy shock absorbers is a great place to start. They're 56mm in length and feature a threaded body, which is awesome because it lets you easily adjust the ride height and pre-load by simply screwing the collars up or down. The aluminum piston and high-viscosity oil (not included – you'll need to add your own shock oil) provide smoother, more controlled damping for better handling over rocks and obstacles. They not only perform better than stock plastic shocks but also add a killer, scale-looking metal detail to your rig's chassis. They're a direct fit for the TRX4M and compatible with several other 1/18 scale platforms. Installation is straightforward for any RC hobbyist. Note: They arrive without oil, so you'll need to fill them with the weight of oil you prefer for your driving style.