Shimano SM-RT66 Disc Brake Rotor - Silver 203mm 6-Bolt
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Product Information
Full details
This SHIMANO SM-RT66 203mm 6-Bolt disc brake rotor is designed for cyclists seeking reliable performance and a touch of elegance on their rides, particularly for touring or general trail use. Its key benefit is providing consistent braking power. A potential consideration is its compatibility, which is limited to metal brake pads.
All features
| Series | SM-RT66 |
|---|---|
| Model Part Number | SMRT66L |
| Brand | SHIMANO |
Extended Product Information
FAQs
What type of brake pads should I use with the SM-RT66 rotor?
This rotor is specifically designed for use with metal (sintered) brake pads. Using resin pads is not recommended and may lead to poor performance or damage.
Is the SM-RT66 rotor compatible with Center Lock hubs?
No, the SM-RT66 rotor features a 6-bolt mounting system and is not compatible with Center Lock hubs. You will need a 6-bolt compatible hub.
How do I clean the disc brake rotor?
Clean the rotor surface with isopropyl alcohol and a clean, lint-free cloth. This will remove oils and contaminants that can affect braking performance. Avoid using solvents or lubricants on the rotor.
What is the advantage of a 203mm rotor size?
A larger rotor diameter like 203mm provides increased stopping power and better heat dissipation compared to smaller rotors. This is beneficial for heavier riders, long descents, or bikes used for touring and mountain biking.
Do I need to bed in the brakes after installing this rotor?
Yes, it is highly recommended to properly bed in your brakes after installing a new rotor or new brake pads. This process ensures optimal braking performance and longevity by creating an even transfer layer of pad material onto the rotor surface.
Can I use this rotor for regular commuting?
Yes, while designed for performance, the Shimano SM-RT66 rotor can be used for commuting. Its durable construction and reliable braking make it suitable for various cycling disciplines.
Troubleshooting
Rotor is making noise (squealing or grinding)
Ensure the rotor is clean and free of contaminants. Check that brake pads are compatible (metal only) and properly bedded in. Verify the rotor is not warped and bolts are torqued correctly.
Braking performance is weak or inconsistent
Clean the rotor and brake pads. Check for signs of glazing on the pads. Ensure the rotor is compatible with the brake pads being used (metal). Re-bed the brakes if necessary.
Rotor appears warped or bent
Carefully inspect the rotor for any visible bends. Minor bends can sometimes be straightened with a rotor truing tool, but significant damage may require rotor replacement.
Brake pads are wearing out too quickly
Confirm that the rotor is clean and free from abrasive debris. Ensure the brake pads are of good quality and designed for use with metal-compatible rotors. Excessive heat or aggressive braking can also accelerate wear.
Pros and Cons
Pros
- Provides strong and consistent braking power.
- Durable construction ensures longevity.
- Compatible with widely available 6-bolt hubs.
- Suitable for use with metal brake pads for maximum stopping force.
- Easy to install and maintain.
Cons
- Only compatible with metal brake pads; not suitable for resin pads.
- 203mm size may be overkill for some lighter-duty applications or smaller bikes.
- Requires a 6-bolt hub interface, not compatible with Center Lock systems.
Setup, Compatibility & Care
Setup:
- Ensure your wheel hub has a 6-bolt disc brake mounting pattern.
- Align the rotor with the mounting holes on the hub.
- Insert the bolts and tighten them evenly in a star pattern to the manufacturer's recommended torque specification (typically 5-7 Nm).
Compatibility:
- Hubs: Compatible with all standard 6-bolt disc brake hubs.
- Brake Pads: Specifically designed for use with metal (sintered) brake pads. Do not use with resin pads.
- Brake Calipers: Compatible with most Shimano hydraulic disc brake calipers and many other brands designed for 6-bolt rotors.
Care:
- Cleaning: Clean the rotor surface regularly with isopropyl alcohol and a clean cloth to remove dirt, oil, and debris. Avoid using petroleum-based cleaners.
- Inspection: Periodically check for signs of wear, damage, or warping.
- Bedding-in: After installation or replacing pads, follow the brake manufacturer's specific bedding-in procedure to ensure optimal performance.