The Sunstar 520RTG1 Works TripleGuard Road Race Chain is the same one used the past few seasons by HSBK Factory Racing team on the Aprilia 1000s. It features Sunstar’s “TripleGuard” sealed ring design, which means the seal has three lips and lubrication pools per side (similar to XW shape ring). This keeps the chain well lubricated throughout all times and conditions during racing/track use. With an 8,800-lb. tensile strength rating and weight of 3.75 lbs. per 100 links, the RTG1 is a great choice for hardcore racers or even casual riders who do the occasional track day.