Derailleur gears several standards in use, and in each the product of the derailleur's actuation ratio and the length of cable pulled must equal the pitch of the rear sprockets. The following standards exist. Some rear derailleurs, especially for mountain bikes, incorporate a clutch to keep the lower length of chain in sufficient tension to prevent the chain from striking the bottom of the chain stay, called "chain slap", and which can damage the chain stay. Clutches are also helpful in preventing the chain from derailing from the chain ring on systems without a front derailleur. The front derailleur only has to
The Word Is Live cover of a song by The Young Rascals, and "Go Through This" and "We Can Fly From Here" from the tour to support "Drama", but which were not released on that album. The latter would eventually be reworked and released thirty-one years later in the album "Fly from Here". The title is a pun on the lyric, "(and) the word is love", from their song "Time and a Word". "The Word Is Live" (Rhino R2 78234) failed to chart in the UK or US. The Word Is Live The Word is Live is a box set by the English progressive