Check the listing for details. Longboard Solid Bushings for Downhill Stability Double Kingpin Trucks. Condition: New. Listed at 9.90 USD. Longboard Solid Bushing How it worksThese bushings are designed to eliminate speed wobbles that plague double kingpin trucks at high speed. To install: swap one set of bushings on each truck. This reduces maneuverability in favor of stability. These are solid polymer, they do not flex at all. Fits only double kingpin trucks. Each product from Apollo is designed and manufactured in house - ensuring the highest quality. We use a variety of manufacturing techniques including additive manufacturing. Contact information for suggestions, custom solutions, new products and feedback can be found in our profile Shipped USPS First Class Package with tracking. We strive for 100% customer satisfaction and 5 star feedback. Please contact us with any questions or concerns. We offer 100% refund of the purchase price when items are returned in original condition within 30 days. Shipping charges are non-refundable unless the error was on our part. Designed by Apollo in the United States