Following extensive lab-based and real world testing DT's engineering team in Biel decided that there was really only one place to go ... carbon!So the 3rd generation Spline 1 now sports a brand new bespoke 30 mm wide carbon rim design to push DT's signature wheel system to ever greater heights and even lower weightsA true all-rounder, the XMC family has a heritage that includes everything from Olympic gold medals to downhill speed record attempts, the XMC 1501's are designed to be the perfect lightweight, sturdy companions for big days out in all terrainsAt the very centre of this system are the new Ratchet DEG 240 hubs, with oversized 90 tooth ratchets for near-instant engagement combined with DT's renowned reliability and ease of serviceDEG ratchets are twice the size of standard of EXP ratchets to ensure years of reliable use the hub still retains DT's easy tool-free servicing and ability to be worked on trailside if requiredFurther weight is saved by the new Swiss-made Comp Race spokes that are butted down to 1.6 mm, making them not only lighter, but give a more forgiving and damped ride, offsetting the added stiffness the move to a carbon rim often brings, just another benefit of designing and manufacturing the entire wheel system in houseWhen bought as a pair the wheels will come with both Shimano MICRO SPLINE and Scram XD freehubs, 6-bolt adaptors, tubeless tape and premium lightweight tubeless valvesMaximum recommended system weight: 120 KGWeight: 27.5 inch, Front: 728 grams Rear: 867 grams 29 inch, Front: 775 grams Rear: 914 grams