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
God (word) the translations of the Arabic ', Persian "Khuda", Indic "Ishvara" and the Maasai '. In the English language, capitalization is used for names by which a god is known, including 'God'. Consequently, its capitalized form is not used for multiple gods (polytheism) or when referring to the generic idea of a deity. Pronouns referring to a god are also often capitalized by adherents to a religion as an indication of reverence, and are traditionally in the masculine gender ("He", "Him", "His" etc) unless specifically referring to a goddess. God (word) The English word god continues the Old English ' ('