The wheels are equipped with DT Swiss 240s hubs. This is a series of hubs for perfectionists. Optimized for the lowest weight. It was designed without compromise. The front hub has two machine bearings. The rear hub is equipped with four machine bearings and a ratchet system (18 teeth), which guarantees excellent freestanding work. Servicing the rear hub is very simple. Service of rear hub does not require any tools. Lightweight with an internal width of 35mm, the XM 521 brings together the ability to run plus tires without holding you back. DT Swiss knows exactly how light it can design a product to fulfill its purpose to perfection. From cross country to enduro, the XM 521 is the ultimate all around plus rim.
The connecting elements between hubs and rims are spokes and nipples.
We used the DT Swiss Competition spokes in the Race version. Spokes are bladed 2.0-1.6-2.0.
Sapim's anodized Polyax nipples are treated with a special coating to increase durability and allow for easier wheel building. Aluminium saves weight,compared to other materials like brass. Sapim's patented Secure Lock technology is a locking mechanism that prevents nipples from untightening. The advantages of this easy locking system are the possibility to use them on a truing machine and that there is no loose function while truing the wheel. Highly precise and accurate machines have specifically been developed to produce this type of locking system. They ensure stable and well defined deformation on the thread and increase the nipple's torsion about 18 cNm (+/- 3 cNm).
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