Shimano RT-CL700 road and MTB bike brake disc with external clamp nut

A high-performance Centre Lock disc for powerful, quiet and consistent braking

The RT-CL700Shimano is a Centre Lock brake disc designed for road bikes, mountain bikes and other bikes fitted with a compatible braking system. It features ICE TECHNOLOGIES, developed by Shimano to improve heat dissipation and maintain consistent braking performance, particularly during repeated braking and long descents.

This version comes with an external-grooved clamping nut, allowing it to be fitted to a compatible Centre Lock hub using the appropriate tool. It is available in 140, 160, 180 and 203 mm, to meet different power requirements and bike configurations.

Key features of the RT-CL700 Shimano

• Centre Lock technology for quick and precise fitting.
• External clamping nut included.
• ICE TECHNOLOGIES for improved heat management.
• Optimised 3D-shaped aluminiumcentre hub .
• Rotor construction: stainless steel + aluminium + stainless steel.
• Standard thickness of 1.75 mm.
• Compatible with organic/resin and metal brake pads.
• Available in 140, 160, 180 and 203 mm.
• Designed to minimise thermal deformation and friction noise.

ICE TECHNOLOGIES: more consistent braking

The RT-CL700 incorporates Shimano ’s ICE TECHNOLOGIES. Its rotor features a three-layer construction comprising two layers of stainless steel surrounding a layer of aluminium. This design facilitates the dissipation of heat generated during braking.

The aim is to limit the system’s temperature rise in order to maintain more consistent braking performance when the brakes are under heavy use. This is particularly beneficial in the mountains, on long descents or during mountain biking where frequent braking is required.

An optimised 3D-printed aluminium bracket

The RT-CL700 uses a 3D-optimised aluminium backing plate. Shimano states that this design helps to minimise heat-induced warping and friction noise from the disc.

This focus on rigidity and stability also helps ensure consistent contact between the disc and the brake pads.

Centre Lock mounting with external nut

The Centre Locksystem allows the disc to be secured directly onto the front hub’s splines before being held in place with a locking ring. Shimano highlights the speed of assembly and disassembly of this system, as well as its precision and rigidity.

The version shown here uses a locking ring with external splines. According to Shimano, the product codes corresponding to this configuration include the ERTCL700SSE (140 mm), ERTCL700SE (160 mm), ERTCL700ME (180 mm) and ERTCL700LE (203 mm).

Which diameter should you choose?

The disc diameter must match the specification of the bike and the brake caliper.

• 140 mm: suitable for road bike set-ups prioritising lightness and controlled braking power.
• 160 mm: an excellent balance between versatility and power, very common on road bikes and mountain bikes.
• 180 mm: more geared towards power and thermal management requirements.
• 203 mm: designed for set-ups requiring superior braking power and thermal capacity, particularly on certain mountain bikes and e-bikes.

The maximum compatible diameter must always be checked against the fork, frame, brake caliper and brake adapter.

Technical specifications