CMPTZN – Aluminum Masterpiece
Fulcrum's lightest aluminum wheelset to date is typically purist with its elegant Black-on-Black finish. However, the minimalist design should not obscure the numerous technical innovations that characterize the Racing Zero CMPTZN DB.
The aluminium 6082 rims, made entirely in Italy, give the CMPTZN wheels a distinctive look, while the characteristic Fulcrum Two-to-One™ construction with oversized double-ended aluminum spokes guarantees resistance and responsiveness. The hubs are equipped with Oversize flanges to offer the aerodynamically shaped spokes an optimal angular position. Inside, the renowned CULT™ ceramic bearings provide unparalleled smoothness.
Technical details of the Fulcrum Racing Zero CMPTZN DB wheelset
- rims: aluminium 6082-T6 (Pre-Aged, triple milled)
- tire type: 2-Way Fit (Clincher, Tubeless compatible).
- construction: Hooked
- wheel size: 28 inch (700C)
- outer width: 23.8 mm / inner width: 19 mm / profile height: 30 mm
- front hub: carbon, oversize flange and axle of aluminum
- rear hub: aluminum, oversize flange and axle of aluminum
- brake disc mount: Centerlock / AFS
- bearings: CULT™ (ceramic)
- installation dimension: 12 x 100 mm / 12 x 142 mm (thru axle)
- spokes: aluminum, aero, Straightpull
- spoke count: 21 (front + rear)
- spoke pattern: Two-to-One™ (14 left / 7 right)
- nipples: aluminum
- weight: approx. 1570 g (manufacturer's specification)
- max. system weight: 120 kg
RDB™ (Rim Dynamic Balance) | The concept is simple and ingenious: the mass of the rim joint is balanced with an equivalent mass positioned exactly opposite. The method of balancing differs depending on the rim material and series. However, the result is always the same: a perfectly balanced wheel during rotation.
Anti-Rotation System™ | To take the concept of the spoking system to a new level of performance, Fulcrum engineers have designed the spokes and hub shell to form a firm and solid unit. This results in the spokes never losing their initial tension, keeping the wheel always centered and correspondingly responsive. It also preserves the spoke position determined in the wind tunnel, ensuring the best possible aerodynamics in all conditions.
CULT™ (Ceramic Ultimate Level Technology) | The concept is based on an exclusive Cronitect® steel used for the bearing race surfaces, which requires no grease for lubrication but only a small layer of oil. Combined with extremely precise processing, the high-quality ceramic balls enable a drastic reduction in the coefficient of friction. The result is a nine-fold increase in smoothness compared to impellers equipped with conventional bearings.
Two-to-One™ (2:1) | With its "2:1 Two-to-One™ Spoke Ratio" patent, Fulcrum solves a classic problem of cycling. By using twice the number of spokes in the critical areas, it compensates for the loss of energy caused by the rotation of the cassette under full load, which causes the spokes to yield at the freewheel and a corresponding loss of tension in the rim. By practically two spokes take over the task of one, the torsion of the wheel is reduced and the power transmission is much more efficient. The improved balance of spoke tension also benefits the fatigue strength of the rim, hub and spokes.
MoMag™ | A magnet and a lot of expertise. With the simple yet ingenious "Mounting Magnet" system, it is possible to realize wheels that do not require any holes on the upper rim flange and can still be spoked by clamping conventional nipples. The nipples are inserted via the valve opening and then "guided" by a magnet to the connection point with the rim. No holes in the rim bed mean a consistently uniform rim with no critical points or fractures. Moreover, with Clincher profiles, no rim tape is required, which in turn has a positive effect on weight. The advantages are numerous: longer durability and greater fatigue strength as well as higher stiffness and acceleration.
