The BGM PRO 177 piston rings are extremely break-proof, have very little friction due to their coating and are very torsionally stiff.
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With 1mm thickness they are also suitable for very wide and high exhaust shapes.
The rings are supplied packed in pairs.
The piston rings with 63.0mm diameter also fit:
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177/187ccm Parmakit
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177/187ccm Polini Alu
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177/187ccm Pinasco Alu/Cast (from year of manufacture 2015-)
technical data
diameter: Ø63.0 mm
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Thickness: 1.0 mm
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Scope of delivery: 2 rings
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