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Shimano Brake Adapter - Black - 140 mm

Shimano Brake Adapter - Black - 140 mm

This Shimano brake adapter is designed for reliable performance and easy installation. Engineered ...

Best current price£35.99from Merlin Cycles

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Product Information

Full details

The Shimano Brake Adapter 140 mm is an essential component for cyclists looking to mount disc brake calipers onto their frames or forks with precise alignment. It is specifically engineered for riders transitioning to or maintaining a 140 mm rotor setup, offering robust durability and seamless compatibility with Shimano braking systems. While it provides excellent structural integrity, users should verify that their specific bicycle frame and fork mounts are compatible with the 140 mm standard before installation.

All features

Model Part NumberISMMA90R140PS
BrandThomson

Extended Product Information

FAQs

Can I use this adapter with a 160 mm rotor?

No, this adapter is specifically engineered for 140 mm rotors. Using it with a larger rotor will cause improper contact and could be dangerous.

Is this adapter compatible with non-Shimano brakes?

While designed for Shimano systems, it may work with other brands that follow the same mounting standards, though this is not guaranteed.

Does this adapter mount to the front or the rear?

Compatibility depends on your specific frame and fork interface. Always verify your mounting standards before purchase.

What tools are needed for installation?

You will generally need a set of metric hex keys (commonly 4 mm or 5 mm) to secure the adapter and caliper bolts.

Does the black coating wear off easily?

The finish is durable and designed to resist environmental wear, though contact with abrasive surfaces or deep scratches may eventually expose the underlying material.

Troubleshooting

Brake caliper appears misaligned with the rotor

Check that the adapter is fully seated against the frame mount and that no debris is trapped between the surfaces.

Brake bolts keep loosening

Apply a drop of blue (medium) thread-locking fluid to the threads before installation and ensure bolts are torqued to the frame manufacturer's specifications.

Brake rub on the rotor

Loosen the caliper mounting bolts slightly, squeeze the brake lever firmly to self-center the caliper, and tighten the bolts while holding the lever.

Pros and Cons

Pros

  • Ensures accurate caliper-to-rotor spacing
  • High-quality construction for long-term reliability
  • Lightweight and unobtrusive design
  • Protective black coating prevents surface oxidation

Cons

  • Compatible only with 140 mm rotor configurations
  • Requires specific frame or fork mount standards
  • Does not include mounting bolts in all retail kits

Setup, Compatibility & Care

Installation requires a standard hex key set. First, ensure your frame or fork mount is clean and free of paint buildup, which can cause alignment issues. Attach the adapter to the mount using the appropriate bolts, then secure the caliper to the adapter. We recommend using a medium-strength thread-locking compound on the bolt threads to prevent loosening due to vibration. For maintenance, periodically inspect the bolts for tightness and check the adapter surface for any signs of mechanical stress or impact damage after long-distance rides.

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