MATERIALS & TECHNICAL DETAILS
It is extremely important to highlight the difference between motorcycle and car wire wheels. Building materials are very different. For cars, the use of stainless steel spokes is not advisable at all because the side (lateral) forces applied during steering and braking which could cause the loosening or braking of the outer-laced spokes.
The spokes are manufactured with bona fide steel 39NCD/4 80-90 Kg/mm2, this will result in higher strength and flexibility and will make the spokes able to resist to the side forces without reaching the breaking point.
Our special alloy 6082 used for manufacturing the rims have been developed & perfected over decades to allow the maximum resistance and the minimum weight, the HB hardness level is a very important aspect. The proper alloy will make the cold dimpling possible, but will keep the rim strong enough to be repaired in case of small cracks. It also enables for perfect roundness with a very small tolerance. Hot dimpling can cause heavy deformation of the rim during the cooling process, this is another reason why today we manufacture rim-thru spinning without welding, which used to be the weak spot in the past. Some wheels were manufactured with a heavy-duty rim and without dimples, some of those are still available, even if tests showed no improvement and it only added more weight. For this reason this was abandoned.
As far as the centerpieces are concerned, we have 2 products, the standard one for regular street use and one with competition specs made in C/45 steel from a solid hub. The unique material combination between hub, centerpiece, spokes and rim results in the Borrani wheel-quality. The use of other materials (specifications) will compromise the safety of our products. Therefore, it is strongly advised to have your Borrani wheels serviced/restored only at the Borrani factory.
Others claiming they can do Borrani restorations are not official and do not use the proper materials & techniques.