YBEKI 130BCD Chainring - CNC Machined 7075-T6 Aluminum Narrow-Wide Chainwheel for Road Bikes (38-60T Options) | 8-12 Speed Compatible | Ultra-Lightweight | Anti-Drop Design

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• ①【 Aerospace-Grade Material & Precision Engineering】✓ 7075-T6 Aluminum Alloy (572MPa tensile strength, 30% stronger than 6061 aluminum) for unmatched durability.✓ 5-Axis CNC Machining with ±0.01mm tooth tolerance (ISO 13041 certified) for precise chain engagement.✓ Military-Grade Hard Anodization (HV800 surface hardness, 3x wear resistance) to resist corrosion and scratches. ✓ Compatibility: 8-12 Speed Road Bike 130BCD Chainring
• ②【 Advanced Anti-Drop Chain Retention System】✓ Alternating Narrow-Wide Tooth Profile (7.3mm wide / 6.8mm narrow teeth) perfectly matches 8-11 speed chain pitches.✓ Dynamic Chamfer Technology enables 45% faster chain engagement, tested to reduce chain drops by 92% on rough terrain.✓ Extended Tooth Tips enhance stability, ideal for high-impact MTB rides and aggressive road cycling.
• ③【 Ultra-Lightweight & High-Stiffness Design】▸ 3D Hollow Structure cuts weight by 63% compared to steel, achieving a featherlight profile without compromising strength.▸ Asymmetric Reinforcement Ribs deliver 155Nm/deg lateral stiffness, ensuring power transfer efficiency up to 98.7%.▸ 1kg Total Weight Reduction for your bike, boosting climbing performance and overall agility.
• ④【Pro-Level Performance Features】✓ Mirror-Polished Teeth (0.09μ ultra-low friction coefficient) minimize energy loss during pedaling.✓ Self-Cleaning Grooves reduce mud accumulation by 70%, maintaining peak performance in wet or dirty conditions.✓ Dual Anodized Finishes (Matte Black/Ceramic Coated, Racing Red/UV-Resistant Nano-Dye) for style and long-lasting colorfastness.
• ⑤【1-Year Warranty & Premium Support】✓ Zero-Rust Guarantee: Free replacement for any oxidation within 12 months—no questions asked.✓ 24/7 US-Based Technical Support: Expert mechanics respond to inquiries within 24 hours for hassle-free installation.✓ 48-Hour Replacement Promise: Defective parts shipped gl