Brand-new, high-quality chainring component with sealed bearing and CNC-machined tooth profile designed for square-hole mounting. Key benefits - Smooth, quiet rotation: sealed bearing prevents contamination and reduces unusual noises during use. - Accurate chain engagement: CNC-crafted tooth pattern ensures precise geometry for reliable chain tracking and smoother pedaling. - Direct fit for square-hole mountings: includes a matching chainring designed to fit square-bore (four-sided) spindles for straightforward replacement and compatibility with square‑taper crank systems. - Low-maintenance performance: sealed bearing and precise machining reduce the need for frequent adjustments and help maintain consistent operation. Important attributes - Function: replacement chainring component that transmits pedal power to the chain with accurate tooth profile and integrated sealed bearing for stable rotation. - Compatibility: made to pair with chainrings and cranks using a square (four-sided) bore; intended for standard square-hole mounting systems. Verify your crank spindle type before ordering. - Precision: CNC-manufactured tooth pattern for consistent dimensions and repeatable engagement. - Condition: brand new and inspected for quality. Typical use scenarios - Commuter bike repair: replace a worn or noisy chainring on an everyday city or commuter bicycle with square-taper crank fittings. - Vintage or entry-level bike restoration: restore proper chain engagement and quiet operation on older bikes that use square-hole chainrings. - Workshop spare or DIY maintenance: keep as a ready replacement for routine service jobs or emergency field repairs. What to expect - Easy swap-in for compatible square-hole setups, quieter operation thanks to the sealed bearing, and predictable chain interaction from the CNC-toothed design. Check fitment against your existing crank and chainring specifications to ensure compatibility.