[TEAM THREE WHEE]

Okay:
From the picture above, silver adapter is "A" and black adapter is "B".

First the wheel bore has 2mm clearance on the tapered transistion so this is not an interferance issue for different brands of simular adapters,ie. vintage, trigo ect.
Now if we have a wheel that fits "B", then it might be possible to machine the rear of the mounting pad to make the wheel fit "A", but if the center section of the wheel is not thick enough or has features , ie spokes or pockets, then the pin holes will become exposed on the face side. This is common on most race wheels, the pin holes go completly thru the wheel. The next problem may be the brake caliper, if the caliper on adapter "A" protrudes past the pin face then most likley it will hit the back of the spoke area. Since we machined the pad away to fit the adapter.

The wheel is cast for a pin pattern, 5 pin or 6 pin ,the mould has different top cores to reduce the amount of waste material. The center bore is solid in the as cast state and then machined to what ever is needed. So a blank wheel can be machined for a custom adapter and pin pattern provided it is within the design envelope of the wheel.

As for widening the wheel, it could be widened to the backside, but not to the face side. since the drop center well needs to be within a specified distance from the front bead seat. If we extend this distance the tire will not be able to mount. And the wheel design has spokes that extend to the bead seat diameter, so a stepped lip design would change the diameter of the center section and make the wheel look strange. Also if we make the wheel a reverse profile in 15" most disc brakes will not fit.

I am working on the scanned wheel 3d model now, to bring the tube side profile to current industry speifications, ie safety beads and drop well diameter. Some draft angles need to be adjusted , since the original wheels were sand cast and we will use permante moulds and counter pressure casting process.

scott