Brand New Race-Driven Rear Trail Arm Bearing. You will receive 2 bearings to replace the rear trail arm bearings. This bearing is used in all Polaris RZR 900 and 1000 models that use a trailing arm. Our bearing is designed to replace the stock bearing and crafted reduce vibration and noise. Made of steel with a Teflon inner coating. Designed to replace OEM number 3514689. Fits both sides. Race-Driven is committed to bringing the highest quality products to all riders at an affordable price. Customer Driven – Quality Driven – Race-Driven.