Shimano SLX SM-RT70-SS

The core benefit is superior heat management. By sandwiching an aluminum core between stainless steel layers, this rotor effectively dissipates heat, lowering surface temperatures by about 100 degrees Celsius to prevent brake fade on long descents.

This rotor uses a Center Lock mounting system. As long as your wheel hubs are compatible with Center Lock rotors, it will work with most Shimano and compatible disc brake systems.

Yes, the SM-RT70-SS includes a standard type rotor lockring, so you have everything you need to mount it to your Center Lock hub right out of the box.

The aluminum spider design increases overall rigidity, which helps the rotor maintain its shape under heavy braking loads. Combined with the improved heat dissipation, it offers more consistent, reliable stopping power than a traditional all-steel rotor.

A 140mm rotor is typically used on the rear wheel for cross-country riding or by lighter riders who don't require the extra stopping power of larger rotors. If you are doing heavy trail riding or enduro, you may want to check your frame and fork specifications to see if a larger diameter is recommended.