Galfer Wave Fixed brake disc 200 mm with sensor ring for DJI Avinox

The Galfer Wave Fixed 200 mm with sensor for DJI Avinox is a 6-bolt brake disc for e-MTBs with a DJI Avinox drive system (M1, M2 and M2S). The ring read by the speed sensor is integrated directly into the disc – so it replaces the brake disc and sensor ring in one. 200 mm, 2.0 mm thick, 174 g.

Features

• Integrated sensor ring for DJI Avinox M1, M2 and M2S, no separate sensor ring needed
• One-piece high-carbon stainless steel, wavy edge (Wave design) and anti-corrosion finish
• According to Galfer, powerful, progressive braking, quiet and low in vibration – in the wet and in the dry
• 2.0 mm thick: more mass, absorbs more heat
• Diameter 200 mm, 6-bolt mount, weight 174 g
• Made in Spain

Which e-bikes is it for?

On DJI Avinox, a sensor on the frame measures speed from a toothed ring mounted on the rear brake disc. The Galfer disc already has this ring built in. According to Galfer, it fits the Avinox M1, M2 and M2S motors if your rear wheel has a hub with 6-bolt mounting. If in doubt, send us the brand, model and model year of your e-bike – we will tell you whether it fits.

Front wheel and e-bikes without Avinox

You only need the sensor disc at the rear. For the front wheel and for e-bikes with a different drive system, the standard Galfer Wave Fixed 6-bolt, 2.0 mm fits, or for Center Lock hubs the Galfer Wave Fixed Center Lock, 2.0 mm. If your e-bike measures speed via a magnet on the disc (e.g. Bosch, Shimano or Brose), you will find the right one under Galfer E-Bike Magnet. According to Galfer, the Wave Fixed 6-bolt 2.0 mm in 200 mm takes the MG003 insert magnet.

Which size fits?

The Avinox disc is only available in 200 mm, a size Galfer assigns to enduro, downhill and e-bike. Whether you need an adapter depends on the brake mount on the frame and which disc size it is built for without an adapter: if it is built for 180 mm, you need the +20 mm post mount adapter for 200 mm. Galfer also offers +23 mm, +43 mm and +63 mm. The frame manufacturer specifies the maximum disc size.

What's in the box

1 brake disc including 6 mounting bolts, so there is no need to order new bolts. The sensor disc goes on the rear wheel, so you only need one.

Matching pads

A new disc is best paired with new pads, so that both bed in cleanly together. Pads for your brake: Shimano · SRAM & Avid · Magura · Hope & Trickstuff · Formula · Hayes · TRP

All Galfer discs compared: Galfer brake discs.

Fitting

Here is how to swap it according to Galfer's instructions:

1. Remove the speed sensor from the frame and take out the rear wheel.
2. Remove the original disc and the separate sensor ring.
3. Measure the thickness of the old sensor ring with a vernier caliper.
4. Fit the Galfer disc with the 6 bolts (torque as specified by your hub or brake manufacturer) and refit the sensor. Depending on the measured thickness, place 1 or 2 M3 washers (DIN 125 A) behind the sensor. They make up for the thickness of the old ring so that the sensor sits at the correct distance from the ring in the Galfer disc.
5. In the workstand, check that the sensor detects the disc and the motor runs normally. Then take a slow test ride in a safe place.

Keep the disc and pads free of grease; the Galfer Brake Cleaner is ideal for cleaning. Bedding in new discs: on a flat, safe stretch, brake several times from medium speed down to walking pace, one brake at a time.

Frequently asked questions

Do I still need the old sensor ring?

No. According to Galfer's instructions, you remove the separate ring together with the old disc; after that, the sensor reads the ring in the Galfer disc. Keep the old ring anyway, in case you later switch back to a disc without a sensor ring.

Will the disc fit my brake?

Usually, yes. What matters is the 6-bolt mount on the hub and the right adapter for 200 mm. Before swapping, check that your caliper is suitable for 2.0 mm thick discs.

200 or 203 mm – what's the difference?

Three millimetres in diameter. SRAM uses 200 mm, while Shimano, Magura and Hope use 203 mm. The adapter must match the disc: if your mount is built for 180 mm, you need a +20 mm adapter for 200 mm and a +23 mm adapter for 203 mm. So if you currently run 203 mm at the rear, you will also need to change the adapter.

When do I need to replace the disc?

When it is below the minimum thickness, warped or deeply scored. Galfer marks the minimum thickness on the disc ("MIN. TH."), usually 0.5 mm below the new thickness. Measure the thickness with a micrometer at several points in the middle of the braking surface.

Do I need new pads with a new disc?

Recommended, especially if the old pads are heavily worn or glazed. A new disc and new pads bed in best together. You will find matching pads in the brake pad buying guide.

More about the brand on the Galfer brand page. Not sure whether the disc fits your e-bike? Get in touch – tell us the brand, model and model year and we will tell you what fits.