The "+Black 70" wheelset is a proven and extremely thermally resilient, very light wheelset for drum braked trikes and velomobiles.
Sturmey Archer drum brake hubs in the 70 mm version are used.
The +Black hub has been heavily changed. The hub was provided with flat pockets and threaded holes in the drum base. These are needed to make the temperature transfer to the heat sinks and thus the cooling as optimal as possible.
Due to the anodization of the hub and the black anodized 5 round heat sinks, the hub can radiate much more heat than the original X-SD hub. In addition, the hub is extremely resistant to corrosion. While original silver drum brake hubs develop a gray layer of corrosion over time, the anodized hubs remain almost intact even after years of use in summer and winter.
Another advantage is that with the anodized hubs there is less corrosion within the spoke holes. This means that the spoke hole/spoke fit remains very good. With silver hubs, years of exposure to salt can cause the bore to enlarge and thus reduce the spoke tension.
If the routes to be driven are more mountainous, the total vehicle weight is higher or motor support is installed, we recommend the cooled successor models ++ Black. These wheelsets can dissipate significantly more braking heat and thus ensure even more safety on longer descents and higher speeds.
The spoke tension in our velomobile wheels is chosen to be very high. This is necessary to counteract the expansion of the drum under heavy thermal loads due to braking maneuvers. The very thin laser spokes absorb part of the voltage drop due to their elasticity in the thinner middle section. This and the spoke tension being as uniform and high as possible ensures that the wheels have a high mileage.
To select the right rims, select the appropriate rim and the number of spokes for the variants.
Most rims are tubeless rims. The reason for this is security. If there is a sudden loss of air, the tire bead gets stuck behind the tubeless hump of the rim. This means the tire cannot jump off the rim as quickly. Safe rolling is guaranteed and the rim is protected by the tire.
Of course, our wheelsets can be supplied for use with 12mm and 15mm axles.
The default is 12mm. When used in A7, W9, M9, A9 and other vehicles with 15mm axles, this can simply be specified when ordering.
All wheelsets are assembled ready to ride. The wheels are pressed and the spokes are stretched. Nothing needs to be re-centered or re-tensioned here.
Of course, a suitable, high-quality rim tape is already installed upon delivery. We always use tubeless straps twice to ensure the highest possible safety.
In addition, a wheel report is included in which the key data of the wheelset, such as concentricity, materials used and spoke tensions are recorded. This data is also stored in our company database so that we can quickly provide the appropriate replacement in the event of damage. To identify the wheels, a 4-6 digit serial number is engraved in the rim well near the valve hole.
If you have any questions when selecting a suitable wheelset, we are happy to advise you by email or telephone.
used material:
Hubs: black anodized X-SD drum brake hubs with 5 round heat sinks per hub
Spokes: Sapim Laser black
Nipples: black Sapim Polyax brass nipples
If necessary, washers to improve the nipple inclination
Rim tape
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