ETR2ACKU with idler sprocket model AC (PTFE bushes), automatic device linear spring-action chain drive tensioner consisting of a base in special, very sturdy, antiseize aluminium alloy with tensile strength of 440MPa that ensures perfect glide on high tensile strength galvanized steel rods, to which a threaded aluminium head is fastened. The head is equipped with an idle chain tensioning pinion with double-shielded bearings, model AC.
Accessories
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