2 Derailleur Service It will be useful to have a note pad and pen to help you remember correct orientation of parts. Replace derailleur when this play becomes significant. Do the same test on an old model to compare. Grab the cage at the lower pulley of a new derailleur while mounted to a bike and wiggle it side to side. As the derailleur wears, it will develop play at all pivot points. The rear derailleur will become worn with use and abuse. There are also after-market top pivot “break-away” bolts, which may be installed in place of the original mounting bolt. This often improves performance by removing dirt from pivots.Īdditionally, some models allow for the changes to the pulley cage tension spring. Light lubricant such as Some rear derailleur models allow the internal servicing in order to clean and lubricate. Degreaser for cleaning small parts, such as.
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