XC 1025 is the latest version of Mavic ?XC? rims, and as such is the most advanced evolution. Offering both lightweight and a wider 25mm profile, this welded rim features ISM 4D technology (Inter Spoke Milling), which strategically removes material from the rim where it's not needed but keeps it around the spokes, where tension is applied. This technology makes the rim lighter, for faster accelerations, without compromising durability.Optimised up to the limit of material potential, the XC 1025 is one of the best Cross-Country alloy rims on the market.**Maxtal aluminium alloy**Light and strong and exclusive to Mavic. This specific aluminium alloy offers a higher strength to weight ratio than conventional 6106 alloy**ISM 4D light rim**Inter Spoke Milling 4 Dimensions. An exclusive Mavic patented concept, reducing weight and inertia without compromising durability. Faster acceleration, better handling and more resistance. The perfect mix to make the most of any ride. **SUP welding**Strong and smoother. After bending the rim joint is arc welded. The welded seam is then milled for a smooth finish**UST Tubeless technology**Traction and control. The UST concept improves traction, control and comfort while reducing inertia and flats**Specifications*** Material: Maxtal* Braking: Disc* Profile: Asymmetrical and hookless* Joint: SUP welding* Drilling: Traditional with eyelet* Height: 21mm* Internal width: 25mm* ETRTO: 622x25TSS* Tyre: UST Tubeless Ready* Valve hole diameter: 6.5mm* Tubeless tape width: 28mm (Not included)* Recommended tyre width: 28 to 64mm* Spoke bed diameter: 597mm* Weight: 510g