Even the Heidt's narrowed arms result in some "surprising" changes in the front end geometry.... Anything you change on a front end requires some adjustments to the front end geometry or you can end up with some very poor handling---right down to the point of dangerous.... A designed system that narrows the track width may be ok, don't know for sure, but just going to narrowed arms to use the wheel you have now IMO may not be the best course of action....