Feedback Sports Omnium Quick Release + Adapter Sleeve Description: This Feedback Sports Omnium Trainer Quick Release + Adapter Sleeve set includes materials needed to connect a bicycle with a 9x100mm quick-release style fork to Feedback Sports Omnium stationary trainers. Included with this set is an additional axle sleeve that works with Omnium 12mm Thru Axle Adapters to accept forks equipped with 12x100mm thru-axle fitment. Features: Axle adapter assembly for Feedback Sports Omnium trainers Kit includes 9x100mm quick-release assembly Adapter sleeve to fit inside 12x100 axle adapters