Product description
Fulcrum E-Racing 4 DB C22 Road/Gravel Wheelset 28" HG 8-11-speed Disc CL Clincher TLR black (black)
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Given the steady growth of e-bikes, Fulcrum has developed the first all-round wheel specifically for E-Road and E-Gravel. They have applied their successes in the E-MTB world and their technical know-how to these latest developments in current bikes and the new way of cycling.
Fulcrum first developed a special rim profile for the E-Racing 4 with an inner rim width of 22 mm (ideal for tires between 30 and 45 mm), special self-locking nipples with long head and special spokes. As they have learned in the development of the E-MTB wheels, the motor increases the load on the freewheel, which must also absorb greater torsional loads over longer periods. That's where their focus has been. The freewheel body is the contact point where the driving force is transmitted from the cassette to the impeller, and due to the higher forces and the shocks caused when the motor is activated, it is subjected to higher stresses. That's why they use a hardened steel freewheel body with proprietary ratchet blades that withstand 30% higher breaking stress. The results of a laboratory analysis on the behavior of the individual pawls over more than one billion cycles are clear: The service life of hardened steel is twice that of Ergal pawls used for conventional road freewheels.
RDB RIM DYNAMIC BALANCE
The concept is simple and ingenious: balance the mass of the rim joint with an equal-value mass positioned exactly opposite.
WIDE RIM TECH
The Fulcrum F E department, following the requests of the racing teams, worked to create rims with a greater width in relation to the past, from about 4 mm more than the previous ones.
This technical choice allows to offer the ideal support base for 25/28 mm tires, the preferred sizes today. In this way, stability, optimal handling and high comfort are guaranteed.
ASYMMETRIC RIM
The rim asymmetry is designed to improve the tension of the rim while balancing the forces coming from the brakes and the pinion cluster.
Details
- Tyre width: 30 mm to 45 mm
- Bearing type: sealed cartridge bearings
- DRP - Dirt Road Protection Kit