Park Tool BT-2 Cable Stretcher
Commonly referred to as a “4th Hand”, the Park Tool Cable Stretcher pulls cables tight for adjustment of derailleurs and brakes. It features one-hand operation with a thumb lock to hold the cable tight while your hand is freed up to tighten pull-up bolts and nuts.
|Rear Derailleur Alignment and Adjustment|
|Shimano "Rapid Rise" or "Low-Normal" Derailleur Index Setting|
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