A good choice for road, gravel and cross-country riders with a compatible CENTER LOCK hub who want consistent braking and improved heat control in a 140 mm rotor.
The Shimano RT-MT900 is a 140 mm CENTER LOCK disc brake rotor built for consistent braking when your rides include long, steep descents. Its three-layer stainless steel–aluminium–stainless steel sandwich structure helps limit heat build-up, while the exposed aluminium radiator fin provides additional cooling during demanding braking.
The optimised 3D-shaped aluminium carrier helps resist heat distortion, supporting reliable rotor alignment and helping reduce rubbing noise as the rotor heats up. A more robust arm shape is also designed to improve quiet operation, making this a practical choice when you want strong braking performance without unnecessary brake noise.
Installation is simple if your wheel hub uses the CENTER LOCK spline interface: the rotor fixes securely with a compatible lock ring and can be removed without dealing with individual rotor bolts. Choose this rotor when your bike is already set up for CENTER LOCK and you want Shimano’s advanced heat-management construction in a compact 140 mm size.
ICE TECHNOLOGIES FREEZA
The stainless steel–aluminium–stainless steel structure helps reduce heat build-up during sustained braking.
Exposed aluminium radiator fin
The cooling fin increases the rotor’s ability to manage heat during demanding descents.
3D-shaped aluminium carrier
The shaped carrier is designed to resist heat distortion, helping limit rotor deformation and rubbing noise.
Consistent braking on descents
Built to support dependable braking performance during long, steep descents.
Quieter operation
The more robust arm shape is designed to reduce operating noise and rubbing sounds.
CENTER LOCK mounting
The spline mount and lock ring provide a precise, rigid fixing method for compatible hubs.
140 mm format
A compact rotor size suited to bikes and setups specified for 140 mm braking rotors.
General
Construction
Compatibility and mounting
Performance features
3D Aluminum carrier
The optimised three-dimensional aluminium carrier resists heat distortion, helping prevent rotor deformation and reduce rubbing noise while you ride.
ICE TECHNOLOGIES FREEZA
A stainless steel-aluminium-stainless steel sandwich structure reduces heat build-up. The exposed aluminium radiator fin improves cooling during demanding braking.
CENTER LOCK
The spline mount and lock ring make installation and removal straightforward while providing precise, rigid rotor fixing for efficient braking.
Shimano is a Japanese component brand founded in 1921 in Sakai, Osaka. The company began with bicycle component manufacturing and has grown into a global business focused on bicycle components, fishing tackle and rowing equipment, while keeping its headquarters in Sakai.
In cycling, Shimano is best known for building complete component ecosystems that span road, mountain, gravel, commuting and e-bike use. Its range covers drivetrains, brakes, wheels, pedals, shoes and related parts, and the brand has had a long presence in Australia through a local business established in Sydney in 1992.
