MURPHY COGS
$ 7.50
MURPHY Cogs are quiet & long lasting. Precision CNC Machined from hard CRO-MO Steel. Finished in tough black oxide. Standard BC1.37 x 24T Thread. Strong light 3/32" track cogs work with 3/32" or 1/8" Chains. Six sizes: 13T, 15T, 17T, 19T, 21T, & 23T
Our advice: Do it right, make it tight. Add our matching left hand thread steel lockring.
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