The Dummy Fork is an essential companion for any scenario that requires dropping the fork from a bicycle, enabling complete removal of the fork while keeping the handlebars, headset spacers, and brake caliper organized Installs into the headset and is held in place using the bike’s stem The brake holder features threaded and unthreaded holes for attaching disc brake calipers as well as most rim brake calipers, while the included pad spacer protects hydraulic disc brakes from accidental engagement Compatible with 11/8" threadless stems only - not compatible with threaded headset/quill stem setups Retailers are not permitted to sell on the Amazon.com marketplace unless authorized in writing by Park Tool