A practical choice for riders replacing a worn 6-bolt rotor who want dependable stopping power and broad resin-or-metal pad compatibility.
The Shimano SM-RT66 is a 180 mm 6-bolt disc brake rotor designed as a reliable replacement for compatible mountain bikes and other disc-brake bikes. It offers consistent braking performance with more power, making it a sensible choice for everyday riding, trail use and dependable bike maintenance.
The rotor accepts both resin and metal brake pads, giving you flexibility when replacing pads or maintaining your existing braking system. Its anti-loosen plate construction helps keep the rotor bolts secure, supporting a quick and reliable installation.
If you are changing from a smaller rotor, check your frame and fork’s maximum approved rotor size and use the correct adaptor for the larger diameter. This version is supplied as one SM-RT66 rotor with six rotor bolts.
180 mm braking surface
Provides consistent stopping power for compatible bikes and is a common upgrade or replacement size.
Standard 6-bolt mounting
Designed for hubs that use the 6-bolt rotor interface.
Resin and metal pad compatible
Works with either common pad compound, giving you more flexibility when choosing replacements.
Anti-loosen plate construction
Helps keep the rotor bolts secure once installed.
Quick, secure installation
The integrated bolt-security design supports straightforward rotor replacement.
Stainless steel and aluminium construction
A practical material combination for a dependable replacement rotor.
Six rotor bolts included
The package includes one rotor and six rotor bolts for installation.
General
Compatibility
Features
Anti-loosen plate construction
The integrated anti-loosen plate helps keep the rotor bolts secure, making installation quick and reliable.
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.
