Shimano SM-RT66 Disc Rotor - 180mm | 6-Bolt

Specifications

• Diameter: 180mm
• Mount Type: 6-Bolt (P.C.D. 44mm)
• Material: One-piece stainless steel
• Series: SLX / Deore (M7000)
• Pad Compatibility: Resin and Metal
• Pad Lining Shape: Narrow
• Weight: 154 g
• Features: Anti-loosen tightening plate
• Includes: Rotor, fixing bolts, lock washers
• MPN: ESMRT66MP

FAQ

What brakes is the SM-RT66 compatible with?

It pairs naturally with SLX and Deore level Shimano disc brakes, but the 6-bolt 44mm bolt circle is a standard pattern, so it works with most 6-bolt hubs and Shimano or cross-compatible calipers.

Does it work with resin and metal pads?

Yes. The SM-RT66 is rated for both resin and metal brake pads, so you can run whichever your calipers and riding call for.

Is this a 6-bolt or Center Lock rotor?

This is the 6-bolt version, which mounts with six bolts on a 44mm bolt circle. Make sure your hub is 6-bolt rather than Center Lock before ordering.

Should I run 180mm or 160mm?

A 180mm rotor offers more braking power and better heat management than a 160mm, which makes it a common front-rotor choice for trail and all-mountain riding. A 160mm is more typical for cross-country and rear-wheel use.

Best For

Best for trail, cross-country, and commuter riders running SLX, Deore, or compatible Shimano disc brakes who want a dependable, long-lasting replacement rotor. The 180mm size suits front-rotor use where extra braking power and heat management matter.