Like the all-mountain and enduro wheels, the "XR 1501 Spline One" cross-country wheel has also been given a wider rim. The 2.5 millimetres may not sound like much, but they make a big difference in practice. In addition, the Biel-based company saves 0.5 millimetres of rim thickness on the XR aluminum rim, which means that the weight of the 29-inch wheelset at 1,543 grams is only 33 grams heavier than its predecessor with the narrower rim.

But back again briefly: Why wider rims? Because the tire is supported a little wider on the rim, it rolls less when you speed through the bends. Because the tire is also wider, this allows a little less air pressure, which also results in more comfort.

Against calf power and rough impacts
We had the finest cross-country racing files from Rotwild at our disposal for the test ride. The guys from DT Swiss seem confident in their work when they clamp the thinner rims into hardtails for the rocky trails
. But before the material hassle begins, we pedal up a bit. The wheel feels really stiff here. It responds to powerful acceleration very quickly and with plenty of propulsion - almost like a carbon wheel.

A little later, the singletrack begins and, for us, the more exciting part. Flowing, twisty and fast downhill passages, as well as steps and rock gardens follow in quick succession. This requires you to react quickly - more intensively on a hardtail than on an all-mountain bike. Quick changes of direction, such as in berms, are no problem. The tire holds well on the rim despite low air pressure. It is noticeable that the wheel is very precise when steering. An important feature, especially when there is not much space in the lane.

A little hesitant at first due to the rough sections, we soon put more strain on the wheel to provoke a puncture - aware of the risk of having to fix punctures afterwards. Despite the two audible and perceptible punctures, there were no punctures, but what about the rim? Despite the thinner flanks, the metallic sounds had no consequences for the rims. There were no dents or side impacts to be found.

Conclusion: It doesn't always have to be carbon, and it can be even lighter with aluminum. However, the XR wheelset from the new 1501 Spline One family should be rated very highly. It is robust, for which the ultra-light spokes are not installed, still quite light, and it convinces both in terms of stiffness and smooth running. The widened inner diameter of the rim brings its plus in the areas of tire stability and comfort. This wheelset should therefore also be a loyal companion on high-altitude tours.www.dtswiss.com