RockyMounts JetLine Compatible with Slotted crossbars (aftermarket and factory), Thule square, Yakima round crossbars Includes stainless steel, Long-Throw, lockable Quick release that makes Loading and unloading bikes easy and fast Compatible with disc and standard brake systems, holds skinny road tires to 2.7 inch mountain bike tires Securely lock your bike to rack and rack to car with RockyMounts lock Cores, sold separately (requires a 2-Pack) Please refer to secondary image for fitment (for reference only, sizing may vary by usage)