The main purpose of R&G Spools also known as cotton reels is to provide additional support and protection to the swingarm and rear wheel in the event of a fall or slide. By fitting the spools to the swingarm, the motorcycle's rear wheel is lifted off the ground, allowing it to pivot around the spools instead of directly contacting the tarmac. This helps to prevent damage to the swingarm and rear wheel, as well as other components like the exhaust system.
In addition to their protective function, R&G Cotton Reels can also be used as paddock stand bobbins, which allows the motorcycle to be lifted and supported using a paddock stand for maintenance or storage.
Overall, R&G Cotton Reels are a popular aftermarket accessory among motorcycle enthusiasts, particularly those who participate in track days or other high-performance riding activities.