4-Jeri SS Bicycle Chain Tension Keeper Single Speed Chain Tensioner 4 Jeri Black
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New 4-Jeri Single Speed Chain Tensioner Color: Black Chain Compatibility: 3/32" Single speed chain tensioner with external tension spring AKA: singulators / singleators Converts standard derailleur bikes to a single speed. This tensioner attaches to the same threaded hole that your derailleur is currently attached to. Spring tension from the tensioner keeps the chain tight and keeps the chain tracking on your sprocket appropriately. Just remove the old derailleur and shorten your chain as necessary Chain retention hoop prevents chain derailment Convert any vertical dropout frame with derailleur hanger to a Single Speed Spring loaded arm keeps tension on chain, pulley axle adjusts to optimize chain line Fits bikes with standard 10mm x 1 derailleur mounting hole Mfg claimed weight 113g Color: Black CH4JSSTK JE6521 5051699000432
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