The Shimano Deore SM-RT64 203mm CL External Lock Rotor featured here at Escapa is a brake rotor designed to deliver powerful and consistent braking performance under a variety of riding conditions. Its large diameter improves control and heat management, making it particularly well-suited for MTBs, e-MTBs, Trail bikes, and bicycles subjected to heavy loads.

The Shimano Center Lock mounting system allows for quick installation and removal of the disc using a splined interface and a lockring. This version features an external-tooth lockring, suitable for hubs and axles that require this type of lockring.

203 mm Diameter

The 203 mm diameter provides high braking power and a longer lever arm compared to smaller rotors. This size is well-suited for long descents, heavier riders, E-Bikes, and disciplines where high speeds need to be controlled.

Among its main advantages are:

• Greater power with less pressure on the lever.
• Better heat dissipation.
• More consistent braking during long descents.
• Greater control over heavy bikes.
• Good performance for MTBs, e-MTBs, and heavy-duty use.

Before installation, make sure the frame, fork, and caliper are compatible with a 203 mm rotor and use the appropriate adapter.

Shimano Center Lock System

Center Lock technology uses a splined hub mount and a single lockring. This system provides a precise, rigid, and quick-to-maintain attachment. Shimano notes that the splined hub mount and lockring reduce the time required to install or remove the rotor.

For installation, use a tool compatible with the lock ring’s external teeth and follow the torque specifications provided by Shimano.

External Lockring Included

Part number ESMRT64LEC includes a Center Lock ring with external serrations. This type of lockring is tightened using a tool compatible with Shimano external bottom bracket cups.

The external lockring is generally suitable for hubs with larger-diameter thru-axles, although you should always check the available clearance between the lockring and the fork or frame.

Compatible with resin and metal brake pads

The Shimano SM-RT64 can be used with resin pads and sintered metal pads, offering flexibility to adapt the braking system to your preferences and typical riding conditions.

• Resin pads: quieter operation and progressive feel.
• Metal pads: greater durability and heat resistance in demanding conditions.

You should also check that the caliper is compatible with the narrow shape of the brake track.

Two-piece construction

The disc combines a stainless steel braking surface with an aluminum center hub. This construction is designed to provide strength in the area where the pads make contact and to reduce weight in the center of the assembly.

The open design facilitates the drainage of water, mud, and debris, helping to maintain consistent performance in varying weather conditions.

Key Features

• Shimano Center Lock brake rotor.
• Model SM-RT64.
• 203 mm diameter.
• Powerful and consistent braking.
• Suitable for MTB, e-MTB, and heavy-duty use.
• Stainless steel braking surface.
• Aluminum center spider.
• Approximate thickness: 1.8 mm.
• Compatible with resin brake pads.
• Compatible with metal brake pads.
• Center Lock quick-installation system.
• Closing ring with external teeth included.
• Compatible with the narrow Shimano brake pad shape.
• Silver and black finish.