The shorter the cage the more responsive. If you have a racing configuration (double or compact up front with a cassette in the rear with 25 or less) go with the short cage. If you have a large spread in the rear (touring) consider the longer cage. Record 89 speed outer rings are identical to Chorus, Athena, Centaur and Daytona 89 speed outer rings except for the placement of the chain roll off pin and the countersinking of one bolt hole. ![]() If you have a double up front, consider a medium to short cage rear derailleur. Daytona and Centaur 89 and 10 speed silver inner rings are identical. As a rule of thumb, if you have a triple up front, you should consider either a medium or long cage rear derailleur. Gear spread refers to the difference in teeth between your smallest cog and your largest.
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