Disk adapter Shimano centrelock to 6 holes - ESMRTAD05

Shimano Centre Lock to 6-hole Disc Adapter SM-RTAD05: easily convert your Centre Lock hubs

The SM-RTAD05 Shimano disc brake adapter is designed to allow the use of a standard 6-bolt rotor on a Shimano Centre Lock hub. Highly popular for mountain bikes, gravel bikes and road bikes, this Shimano offers a simple, reliable and cost-effective solution for reusing 6-bolt discs without changing wheels or hubs.

Compatible with numerous through-axle and quick-release standards, the Shimano SM-RTAD05 allows you to quickly convert a Centre Lock wheel to fit a 6-bolt IS brake disc. Its secure mounting with a locking ring ensures the rotor is held firmly in place, even during intensive use.

Why choose the SM-RTAD05 Shimano?

Switching from the 6-hole standard to Centre Lock is a common occurrence when changing wheels or upgrading the drivetrain and braking system. Thanks to the SM-RTAD05 Shimano , it is possible to keep your 6-hole brake discs whilst using wheels fitted with Centre Lock hubs.

Key benefits

• Compatible with Shimano Centre Lock hubs
• Allows the use of standard 6-hole discs
• Quick and easy installation
• Excellent disc retention
• Suitable for road, gravel and mountain bikes
• Cost-effective solution without needing to change the discs
• Lightweight at approximately 45 g

Shimano has developed this adapter to ensure stable and safe braking even during demanding sporting activities.

An excellent solution for gravel and mountain biking

The Shimano SM-RTAD05 brake disc adapter is particularly popular:

• when changing wheels,
• on a customised gravel build,
• as a mountain bike upgrade,
• or for retaining high-end 6-bolt rotors.

Its light weight and wide compatibility make it a reliable choice for cyclists looking for a simple and durable solution. User feedback generally highlights:

• easy installation,
• excellent stability,
• and a discreet, unobtrusive design.

Fitting the Shimano SM-RTAD05 adapter

Installation is relatively straightforward:

1. Position the adapter on the Centre Lock hub
2. Fit the 6-hole disc to the adapter
3. Tighten the rotor’s Torx screws
4. Lock the assembly in place with the appropriate Shimano ring

A tool similar to an external bottom bracket spanner is usually required to tighten the lockring properly. Several Reddit users confirm that the fitment remains straightforward even without much mechanical experience.