New (2015+) Kinetic trainers come with a Standard Cone Cup and a Slotted Cone Cup pre-installed. The Slotted Cone Cup is installed on the non-drive side of the bike trainer and is designed to interface with the quick release side of the Kinetic trainer skewer (in the box). Please use the skewer we've provided whenever possible when using your trainer. The pre-installed cone cups will work with most bikes including many BMX and track bikes. If you find that they don't you may need one of the adapters below. If you're unsure which cone cups came with your trainer, check here. If your bike has a rear thru-axle, you may need a Traxle. For more information, click here.