87.00mm Single Piston Ring Set 1.0 1.2 2.8mm

The Wiseco 87.00mm Single Piston Ring Set (1.0 x 1.2 x 2.8mm) is a precision-engineered replacement component designed for high-performance engine rebuilds and restoration work. This ring set fits a 3.425-inch bore and delivers the drop-in compatibility needed for single-cylinder applications where factory-original or OEM-equivalent performance is required.

Each ring is manufactured from steel and finished with gas nitriding—a surface treatment that enhances hardness and corrosion resistance while maintaining the dimensional stability critical for proper cylinder sealing. The three-ring stack (1.0mm, 1.2mm, and 2.8mm thicknesses) follows standard tension specifications, ensuring predictable blow-by control and oil consumption without compromising ring life. Wiseco's manufacturing tolerances mean these rings seat quickly and perform consistently across varying engine speeds and loads.

This piston ring set serves motorsports enthusiasts, small-engine technicians, and powersports rebuilders who demand OEM-grade quality without premium pricing. Whether restoring a vintage single-cylinder motorcycle, atv, or small-displacement engine, buyers rely on Wiseco ring sets to deliver the seal integrity and durability expected from a brand established in performance engine components. The gas-nitrided steel resists scuffing during break-in and maintains compression over extended service intervals.

For applications requiring metric bore sizes and single-ring-set fitment, the 87.00mm specification provides exact dimensionality. Each set is sold as a single unit, though multiple sets may be needed depending on engine configuration. Verify bore diameter and ring groove dimensions before ordering to ensure proper fit and optimal sealing performance.