The real challenge was to improve on the
But the developers wanted to further optimize this top product by improving rolling resistance and weight. The logical choice was CULT™ bearings, which allow to save (10 grams less than the Speed 55 DB) and achieve an incomparable rolling resistance compared to conventional solutions by up to nine times, saving up to 3.5 watts per pedal revolution.
In addition to the significant improvement in mechanical performance, the new Speed CMPTZN DB hubs have received a matte black finish to complement the black-on-black graphics of the rims. The models are available in 2-WAY FIT versions, so you can choose between tubeless tires (for lower rolling resistance and higher puncture protection) or with clincher tires (for traditionalists). Last but not least, the internal rim dimension of 19mm gives you more leeway in the possible tire widths you can mount.
The number of spokes on the sprocket side is double that on the opposite side. Greater wheel stability thanks to perfectly balanced spoke tension, as well as greater torsional rigidity and increased reactivity.
Ensures the maintenance of the optimal aerodynamic position of the spokes.
For an external rim profile without holes - the stressability of the structure is increased - a rim tape is not needed and the weight of the wheel is reduced.
USB™ Ceramic Bearings
Reduce friction between balls and bearings, increase smoothness, reduce weight and ensure lasting performance thanks to the absence of corrosion.
Includes: wheelset, wheel bag, tubeless valves, tire levers, DRP kit
|Product Name:||Fulcrum Speed 55 CMTPZ DB Carbon Wheelset - Clincher - Centerlock - FW: 12x100mm | RW: 12x142mm|
|usage bikesport:||Road Bike, Competition|
|hubs:||Front: Carbon with oversize flange, Rear: Aluminum|
|spokes:||round, straight pull|
|shifting system:||9-speed, 10-speed, 11-speed, 12-speed|
|wheel size:||28" (29") (622mm)|
|axle standard:||12x100mm (FW), 12x142mm (RW)|
|Wheel / Hub version:||Wheelset, Wheelset 1300-1700g|
|Freehub Body:||XDR (SRAM 12s Road), HG L (Shimano 11/12s Road)|
|tire type:||Wire Bead Tire, Folding Tire, Tubeless Ready|
|fitting tire dimensions:||23-50mm|
|inner profile width:||19mm|
|rim profile height:||55mm|
|manufacturer item code:||Shimano: RS-21DC5FRASCO | SRAM: RS-21DC5FRAXCO|
|Number of Spoke Holes:||21|