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
Stand on the Word to be future hits. The Keedz version of the song was also used in 2008 in an episode of the Australian television series "Underbelly". The single was re-released a second time around in 2011. The single has been in the SNEP French Singles Chart since October 2011 totalling 28 weeks until end of July 2012 and reaching its peak position at #12 on chart dated 23 June 2012. The Keedz release was accompanied by a music video which became equally popular. Stand on the Word "Stand on the Word" is a funk / soul song written by Phyliss McKoy Joubert