page_title: Glossary of cycling
section_title: R
hierarchical_section_title: Glossary of cycling / R
caption_attribution_description: English: A rock garden on the Rocky Knob mountain bike trail (Boone, NC).
context_page_description: This is a glossary of terms and jargon used in cycling, mountain biking, and cycle sport.
context_section_description: Randonnée
  A ride in the randonneuring discipline of cycling, usually 200–600 km long. Also known as a brevet.
   Randonneuring
  A long-distance discipline of cycling where riders attempt courses from 200 to over 1200 km, collecting stamps at controls with the clock running constantly. Every participant finishing within minimum and maximum time limits is considered a winner regardless of finishing order. Riders may ride in a group or solo as they please, and are expected to be self-sufficient between controls. Randonneuring is not regulated by UCI.
   Recumbent
  A bicycle or tricycle where the rider is placed in a laid-back position, feet first and sitting in a seat instead of on a saddle. Usually used for ergonomics or aerodynamics. All world land speed records are held by (enclosed) recumbent bicycles, but these bikes are not allowed in races governed by the UCI.
   Rip
  To ride fast.
   Rigid
  A bicycle without any suspension system.
   Road captain
  An experienced rider who organizes a team's riders in a road race, including making tactical decisions and improvising new tactics when pre-race plans are overtaken by events on the road. They are the key link between the directeur sportif and the rest of the team. Road captains are normally selected on a race-by-race basis depending on the demands of the event and their relationship with the team leader. Notable road captains in recent years include Bernhard Eisel, Luca Paolini, Mick Rogers and David Millar.
   Road race
  A race on pavement. Longer in distance than criteriums.
   Road rash
  Severe skin abrasions caused from sliding on the asphalt in a crash.
   Rock garden
  A section found on some mountain biking trails with numerous rocks, designed to challenge a mountain biker's ability to ride over it skillfully.
   Rollers
  A type of trainer composed of rolling cylinders under the rear wheel linked to a single rolling cylinder under the front wheel which allow the rider to practice balance while training indoors.
   Rotating weight
  Mass that is rotating while the bike is moving, which is a form of inertia. A bicycle wheel can be approximated as a hollow cylinder with most of its mass near the rim. The rotation of the cranks, hubs, and other parts are less significant because both their radius and rotational speed are smaller. Reducing the rotating weight with lighter wheels and tires will permit faster acceleration and braking (or the same acceleration and braking with less energy).
   Rouleur
  A rider who is strong on flat and undulating roads. The rider is well suited for races such as Paris–Roubaix and the Tour of Flanders. Tom Boonen and Fabian Cancellara are examples of this.
caption: A rock garden on a singletrack trail
exif: {"Image Tag 0x000B": "Windows Photo Editor 10.0.10011.16384", "Image Orientation": "Horizontal (normal)", "Image Software": "Windows Photo Editor 10.0.10011.16384", "Image DateTime": "2017:05:12 15:57:36", "Image Artist": "Vic", "Image ExifOffset": "2266", "Image XPAuthor": "Vic", "Image Padding": "[]", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "96", "Thumbnail YResolution": "96", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "4548", "Thumbnail JPEGInterchangeFormatLength": "7406", "EXIF DateTimeOriginal": "2017:05:12 09:19:28", "EXIF DateTimeDigitized": "2017:05:12 09:19:28", "EXIF SubSecTimeOriginal": "11", "EXIF SubSecTimeDigitized": "11", "EXIF ColorSpace": "sRGB", "EXIF Padding": "[]"}