2012-17 Tesla Model S Rear SUSPENSION Soft PU Bushings Spherical Bearing UPGRADE. This product data sheet is originally written in English. 12-2017 Tesla Model S Full Rear Suspension Ultimate Upgrade to Long Life, Soft PU Bushings, Uniball (Spherical Bearings) Joints (18). Designed to attach the wheel assembly to the vehicle, your suspension links and control arm are a crucial part of your suspension system. One of the bushings' function is to absorb impacts from the road, smoothing and quieting out your ride. The material used to absorb impact and vibrations in OEM bushings is rubber ...