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High Performance Brake Discs



KOM brake discs are made with special materials to enhance performance.


For example; the steel alloy used is far more resilient than the standard materials used in most bicycle brake rotors. The resilience of the material is its ability to absorb energy and still return to its original shape. (I.e. If you bend your rotor, it's more likely to spring back to shape.)

KOM rotors also have superior thermal shock resistance.

Brake Disc Material Thermal Shock Resistance.png

Both these properties make KOM discs far less likely to warp or become distorted in use.  (For example when knocked in technical descents or just accidentally resting the disc against something when putting the bike down.)

At KOM we believe that the material should be put where you need it. Our discs are 2mm thick with a higher solidity ratio on the braking track than many.

We are often asked, "Can I get KOM brake discs for my current wheels?"  


Currently we have only developed our disc rotors for proprietary use with KOM hubs. We do not yet manufacture ISO standard 6 bolt mount discs variants. 

The mounting for KOM rotors differs from the usual 6 bolt style. The KOM standard has a larger centre hole in the disc (losing some unnecessary material and thus weight.) It attaches to the hub via 4 rather than the ISO standard 6, M5 bolts.

The advantages of our system include:

  • An overall much stiffer/ stronger disc as the distance from the mounting point to the braking surface is greatly reduced.

  • Lower forces go through the bolt circle of the disc because of decreased leverage (larger radius bolt circle). This means that less disc material is needed near the bolts and fewer bolts are needed; saving weight on both your disc and bolts, producing an even lighter overall wheel build. (Yes, more hub material is needed to attach the disc at a wider bolt circle, however this hub material is 7 series, aircraft grade aluminium, rather than semi-stainless steel, hence the lower overall weight)

  • Our disc design has an equal material distance at every radius of the disc's braking surface, resulting in evenly wearing brake pads and discs as well as more consistent braking. (In the image below each coloured strip of the braking track is the same length. Each part of your brake pad spends the same distance pressing against disc material over one disc rotation.)

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