YBEKI Pro+ Bicycle Brake Discs 160/180/203 mm (Set of 2) Stainless Steel Ceramic Composite with Titanium Coating For MTB Downhill/Road Bike Sprint 40% Hardness Black/Red/Purple/Blue

1【 Advanced Heat Dissipation System】Patented Oblique Long Hollow Design: Lots CNC-machined heat dissipation holes enhance airflow by 200%, reducing braking system temperature by 40%, 12-Spoke Edge Support Structure: Minimizes warping + Wave-shaped drainage grooves eject mud/water instantly, Rotor Tech: Allows 0.8mm thermal expansion space to prevent high-temperature deformation 2【 Aerospace-Grade Manufacturing Precision】5-Axis CNC Machined (Tolerance ±0.05mm), 420 Martensitic Stainless Steel Baseplate (40±2 HRC Hardness), MIL-SPEC Triple-Layer Anodization (2000h Salt Spray Test Certified), Radial Mirror Polishing (Surface Roughness Ra≤0.8μm) 3【 Ultra-Lightweight Durable Construction】Honeycomb Lightweight Tech: 28% lighter than conventional rotors (160mm:99g / 180mm:125g / 203mm:181g), 6-Bolt Reinforcement System: 304 Stainless Steel Anti-Loosening Screws (6-8N·m Torque), Triple-Layer Composite: 1.5mm SS + 2mm Aluminum Alloy Shim + 0.5mm Anti-Corrosion Coating, EN 14766 MTB Certification Approved 4【Precision Sizing Guide】▷ 160mm (6.29") - XC Cycling/Road Bikes/Teen Bikes, ▷ 180mm (7.08") - All-Mountain/Enduro Riding, ▷ 203mm (7.99") - Downhill/E-Bikes/EMTBs, ◆ Includes 12 Titanium-Coated M6×16mm Screws (10.9 Grade Tensile Strength), Color Guarantee: Cerakote Ceramic Coating (5-Year Fade Resistance), Four colors available: (Black/Red/Blue/Purple) ✅ 【1-Year Warp & Crack Warranty】Stress-Free Coverage: 12-Month if warping exceeds 0.2mm & "Zero Rust" Promise – Free replacement if oxidation occurs, 24/7 Expert Support – UK-based mechanics answer questions within 12 hours, Fast Replacement: Defective parts replaced within 48 hours