Shimano XT RT86 180mm Disc Brake Rotor 6-Bolt Silver Black MTB Bike

The Shimano Deore XT SM-RT86 Disc Rotor is engineered for riders seeking superior braking performance without compromising on durability or weight savings. Designed specifically for mountain bikes with 6-bolt hubs, this two-piece rotor combines cutting-edge materials to deliver reliable stopping power even during intense trail sessions or downhill races. Its innovative tri-layer construction features an aluminum center spider flanked by dual stainless steel outer layers—a design that slashes rotor surface temperatures by up to 100°C compared to solid steel alternatives. This thermal advantage ensures consistent brake modulation and reduces fading during prolonged descents or aggressive riding scenarios.

The lightweight aluminum spider not only contributes to a total weight of just 149g but also minimizes rotational mass for snappier acceleration and smoother pedal feedback. Compatibility is key here: these rotors work seamlessly with all brake pad compounds, giving you flexibility whether you’re using resin, sintered metal, or hybrid pads. Plus, every set includes pre-installed fixing bolts and non-turn washers for hassle-free installation right out of the box.

For trail enthusiasts and XC racers tackling technical terrain or steep drops, the SM-RT86 offers a balance of strength and responsiveness. Unlike single-layer steel rotors that warp under heat or heavier designs that drag down bike performance, this rotor maintains structural integrity while keeping your brakes cool under pressure. Its two-piece build simplifies maintenance and ensures even wear distribution over time.

Comparison at a Glance
| Feature | Shimano Deore XT SM-RT86 | Competitor Rotor A | Competitor Rotor B |
|————————|——————————-|—————————-|—————————-|
| Temperature Reduction | Up to 100°C cooler | Minimal cooling effect | No notable reduction |
| Weight (180mm) | 149g | 165g | 172g |
| Material Construction | Tri-layer (Aluminum + Stainless Steel) | Solid steel | Single-layer aluminum |
| Pad Compatibility | All compounds | Limited compounds | Resin-only |
| Included Hardware | Bolts + Non-turn washers | Requires separate purchase | Requires separate purchase |

Ideal for riders prioritizing efficiency and adaptability, the SM-RT86 excels in scenarios where rapid deceleration meets high-speed momentum—whether carving through rocky trails or navigating tight switchbacks. Its lightweight yet robust build makes it a top choice for endurance-focused cyclists aiming to reduce fatigue while maintaining control in demanding conditions.