The technical data of the sprocket JTR1140: Material: C45 steel Hub Diameter : 100mm Bolt circle Diameter: 120mmAttachment: 4 holes Mounting holes Diameter: 8,5mm All sprockets are made of C45 or C49 steel and have OEM quality. We only use sprockets made by top brand manufacturers JT ( Jomthai ), Maxum-Tech ( made by JT ), Supersprox or Esjot. A first-class sprocket and pinion should always be installed with a first-class chain. Therefore, we combine our sprockets only with the chains of the Japanese original equipment manufacturer RK and DID.
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