The production method of Borrani rims differs per wheel type.
X-Ray rims are obtained by spinning, a proprietary Borrani technology where a 6082 aluminium alloy disc is progressively shaped by a spinning tool. The cold machining guarantees the maximum material homogeneity. A further heat treatment provides the required T6 hardening grade.
The S-Ray rims are obtained by low-pressure casting of AlSi7 aluminium alloy.
Sixty-four high-grade, AISI 304 stainless steel spokes are used for both the X-Ray and S-Ray range.
Assembly and centering are the crucial steps of the manufacturing process. No machine can replace the eyes, hands and experience of the Borrani craftsmen who ensure the wheels their perfect balance.
The Borrani, X-Ray wheels mount a precision machined hub from a solid billet of 6082 T6 grade aluminium, the same material as the rims.
The S-Ray hubs are made of low-pressure cast AlSi 7 aluminium alloy.
The modern Borrani wire wheels are tubeless. Air tightness is guaranteed by a patented system of O-rings, mounted in a chamber specially designed for the spoke head.
Air tightness is guaranteed for temperatures ranging from -30º C to + 110º C.
The aluminium wheel cap – available on request – is inspired by the legendary 3-eared knock-off featured by 007 James Bond's Aston Martin in the Goldfinger motion picture.
X-Ray wheels are equipped with a set of adapted wheel bolts and chromed-plated bolt covers with carved Borrani logo.
On 22nd April 1922, Carlo Borrani brings the Rudge-Withworth International patent to Milan and transforms it into a world standard for technique, style and victory.
The red hand at the centre of the Borrani emblem is homage to the homeland of Daniel Rudge: the Irish province of Ulster.
Said to be attributed to the mythical Irish figure Labraid Lámh Dhearg (Labraid of the Red Hand), the red hand appears in other mythical tales passed down from generation to generation.
The symbol is rooted in Irish Gaelic culture and is still shown in the flag of Ulster.