Disk adapter Shimano centrelock to 6 holes - ESMRTAD05

Shimano Center Lock to 6-hole disc adapter SM-RTAD05: easily convert your Center Lock hubs

The Shimano SM-RTAD05 Disc Brake Adapter is a disc brake adapter designed to allow the use of a standard 6-hole rotor on a Shimano Center Lock hub. Popular with mountain bikes, gravel bikes and road bikes, this Shimano adapter offers a simple, reliable and cost-effective solution for re-using 6-bolt discs without changing wheels or hubs.

Compatible with a wide range of standard thru axles and quick releases, the Shimano SM-RTAD05 can be used to quickly convert a Center Lock wheel to fit an IS 6-hole brake disc. Its secure mounting with locking ring guarantees excellent rotor retention even under intensive use.

Why choose Shimano SM-RTAD05?

When changing wheels or upgrading transmission and braking systems, it is often necessary to switch from the standard 6-hole to the Center Lock. Thanks to the Brake Disc Adapter Shimano SM-RTAD05, you can keep your 6-hole brake discs while benefiting from wheels fitted with Center Lock hubs.

Key benefits

• Compatible with Shimano Center Lock hubs
• Allows the use of standard 6-hole discs
• Quick and easy to install
• Excellent rotor retention
• Road, gravel and MTB compatible
• Economical solution without changing discs
• Lightweight (approx. 45 g)

Shimano has developed this adaptor to ensure stable and secure braking, even when riding hard.

An excellent solution for gravel and mountain biking

The Shimano SM-RTAD05 Brake Disc Adapter is particularly useful when..:

• when changing wheels,
• on a custom gravel set-up
• for MTB upgrades,
• or for keeping top-of-the-range 6-hole rotors.

Its low weight and great compatibility make it a reliable reference for cyclists looking for a simple, durable solution. User feedback generally highlights :

• easy installation
• an excellent fit
• and good aesthetic discretion.

Installing the adapter Shimano SM-RTAD05

Installation is relatively straightforward:

1. Position the adapter on the Center Lock hub
2. Install the 6-hole disc on the adapter
3. Tighten the Torx screws on the rotor
4. Lock the assembly with the appropriate Shimano ring

A tool such as an external bottom bracket spanner is generally required to tighten the lockring correctly. Several Reddit users confirm that the assembly remains accessible even without much mechanical experience.

FAQ - Shimano SM-RTAD05

What is the purpose of the Shimano SM-RTAD05 adapter?

It allows you to mount a 6-hole brake disc on a Center Lock hub Shimano.

Is it compatible with all bikes?

Yes, it works on most road, gravel and mountain bikes using Center Lock hubs.

Can I use thru axles?

Yes, the adapter is compatible with QR, 12 mm, 15 mm and 20 mm axles.

Is it compatible with Shimano RT86 rotors?

No, Shimano indicates that the RT86 and RT76 are not compatible with this adapter.

Is the assembly reliable?

Yes, when correctly tightened, the disc is held in place very well, even in sport use.

Can it be used for gravel?

Yes, it is perfectly suited to gravel, road and mountain biking.