• Brake holder features M5, M6 & passthrough holes for attaching all disc brake mounting styles as well as most rim brake caliper styles
• 1-1/8" steerer tube features star nut for retaining top cap and spacers
• 2" flared cone for compatibility with tapered steerer tubes
• Compatible with 1-1/8" threadless stems only - not compatible with threaded headset/quill stem setups