MTB Headset Bearing, Steel Ring Wheel Bearings for Mountain Stem Bicycle Parts and Accessories (47mm)

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  • High-Quality Steel Material Durable & Protective These bike bearings (compatible with headset bearings and mountain bike back wheel bearings) are crafted from premium steel, delivering long-lasting performance Rust-proof and wear-resistant, with uniform hardness that withstands frequent use and harsh conditions (e.g., mud, rain during mountain biking). High-temperature resistant, avoiding deformation even during prolonged riding (which generates friction and heat). Double-shielded design blocks contaminants (dust, dirt, water) and retains lubricant, preventing internal damage and extending service life.
  • Fine Machining Smooth Rotation & Perfect Fit Precision machining ensures the bearings integrate seamlessly with bike components Smooth surface enables friction-free rotation, improving bike efficiency (e.g., smoother steering for headset bearings or easier pedaling for wheel bearings). Perfectly fits bike headsets (and mountain bike back wheels), eliminating loose fits or wobbling that cause noise or damage to other parts. Unlike poorly machined bearings (which have rough surfaces or mismatched sizes), this accessory ensures stable, quiet operation.
  • Effective Sealing Dust & Water Protection The bearings feature a reliable sealing ring that enhances durability Shields internal components from dust, water, and debris critical for mountain bikes or bikes used in outdoor environments. Prevents moisture from causing rust or corrosion, ensuring the bearings maintain smooth rotation over time. This sealing solves a common issue with basic bearings (which let contaminants in, leading to premature failure).
  • Pre-Greased Grooves Corrosion Prevention & Free Spinning Grease pre-applied in the grooves adds two key benefits Protects the internal balls from corrosion, even in humid or wet conditions. Ensures the balls spin freely without friction, maintaining the bearing s performance without the need for immediate re-lubrication. This saves time on maintenance, as you won t have to grease the bearings before installation.
  • Practical Replacement Accessory Ideal for Bike Repairs These bearings are a essential accessory for bike maintenance Perfect for replacing old, worn, or damaged bearings (common in headsets or mountain bike back wheels due to regular use). Compatible with multiple bike types, making it a versatile spare part for hobbyists, commuters, or mountain bikers. Note The mention of "replacing old bicycle helmets" is likely a typo these are dedicated bike bearings for headsets and wheels, not helmet parts.

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