Original Name / Part No.: AR320379Part location: Rear wheelie barProduct major functions & usage: Stabilize the rear wing, prevent rolling.Is this part adjustable? If yes ¡¦ how and why/purpose?YESHow: Stabilize the rear wing on different positioning holes on the wheelie.Purpose: Adjust the angle of the wheelie and rear wing.Accessories:Wing Mount 1pcStainless Steel Cap Head Screw 3x16 2pcsStainless Steel Round Head Screw 3x10 2pcsMajor advantages of upgrading to this part/product:1. Made with a quality light weight high tensile strength aluminum 6061 T6 for greater durability and more stable to use.2. Adjustable angle on wing mount and wheelie to suit different drive mode.3. The wheelie wheels are hand-made with Delrin with bearings installed to ensure smooth action.