SHIMANO | Genuine SHIMANO MT800 MT900 brake rotors for mountain and road bikes centre lock high-end heat-dissipating discs

MT800 / MT900 CL800 / CL900 Four Core Technologies ICE TECHNOLOGIES FREEZA Cooling System Stainless1. Stainless steel-aluminium-stainless steel three-layer sandwich structure FREEZA aluminium cooling fins ⒉The disc surface temperature drops by about 100℃, and the system temperature further decreases by 50℃ ⒊ Significantly suppresses brake fade, maintaining consistent braking force on long downhill slopes 4. Significantly prolongs the brake pad lifespan   5. NTER LOCK spline installation, quick to assemble and disassemble, stable and reliable MT800 / MT900 Mountain Off-Road SeriesMT800Positioning: Deore XT level | Mountain Trail / Enduro Equipped with ICE TECH FREEZA cooling technology as standard, braking on long downhill slopes remains consistently stable Stainless steel‑aluminium‑stainless steel sandwich structure, cooling by about 150℃ (100 50), excellent resistance to thermal degradation Two-piece aluminium alloy bracket, combining lightweight and rigidity Compatible with metal/resin brake pads, suitable for various riding stylesMT900Positioning: XTR flagship level | Competitive mountain biking Further optimise the heat dissipation on the basis of MT800 (reducing the disc surface temperature by another 20℃ compared to the previous RT99) with lightweight upgrades The 140mm model is 5~10g lighter than the previous generation, while the 203mm model is 30g lighter Braking power is available on demand, and braking performance remains excellent under extreme conditionsCL800Positioning: Ultegra level | Road / Endurance ridingReinforced aluminium alloy bracket Optimised arm design, specifically to suppress thermal deformation, quieter and more controllable than the previous generationICE TECH FREEZA full-range cooling (temperature drop of about 150℃), combined with a sandwich stainless steel‑aluminium structureOne of the quietest disc brake rotors for road cycling, without compromising on heat dissipation and lightness140mm thickness is only 1.75mm, compatible with resin/metal brake padsUltegra-level 'silent champion', no longer troubled by thermal deformation, braking remains calm and stable on long climbs and paved roadsCL900Positioning: Dura‑Ace flagship level | Top road / racingIncorporating an enhanced aluminium alloy bracket on the CL800 base with a black heat-dissipating coating, upgrading heat managementAluminium‑steel‑aluminium sandwich FREEZA fins, temperature drop of about 150°C; 140mm diameter provides greater leverage and braking power, suitable for E-bikes and heavy-duty ridingA quieter braking experience than before, with good consistency during long steep downhill conditionsDura‑Ace flagship cooling, top-level quiet experience, conquering all road descentsMT800: XT-level all-terrain versatility, downhill cooling, lightweight balanced choiceMT900: XTR flagship racing cooling, lightweight, "instant stop" competitive mountain bikingCL800: Ultegra-level road quiet and durable, resistant to heat deformation and rubbing issuesCL900: Dura-Ace flagship road cooling coating, top-tier braking performance and quiet operation on long descents