Mongo

I've tried searching on these, but never really found the info I've been looking for. The 5x130 hub limits us to a less common bolt pattern, exclusively for Porsche. Going to a 5x115 opens the door to many wheel and tire combos.

My search for a hub conversion (NOT ADAPTER) relates to using different wheel/tire combos for track applications, so the hub conversion must be durable. Of course, this will require the use of custom rotors too since all Porsche rotors utilize the 5x130 pattern.

Anyone heard of hubs made for Porsches in a 5x115 bolt pattern?

V2Rocket

5x115 is weird...
5x114.3 (5 x 4.5) is much more common on top of that.

however if you want to get really weird, you might be able to either slot the lug holes in the wheels/rotors, or re-drill the Porsche hubs to 5x5" (5x127) which is from older full-size Chevy cars.

Mongo

5x120.7 is very common in Chevy sports cars (e.g. Camaro and Corvette) after the 1980s. Re-drilling the hubs to accommodate that will really open the door to a more 'multirole' build for a track car later.

I may do a deeper dive into this...

FrenchToast

Redrilling the hubs would necessitate you offset the holes 180 degrees around the axle, and use press-in splined studs. Since the hub is aluminum, threaded studs would pull out once you drove about 20 yards.

Modifying the hub is some sketchy 'engineering,' and would be tempting some real danger. The shape of the hub is designed and optimized specifically for its purpose. Changing any part of it is an extremely questionable endeavor. Consider the physical and thermal stress the part undergoes. Not to mention, the hub is not designed to house studs offset 180 degrees from the normal location. It would break pretty quickly I would imagine.

No-one is going to pass tech on a car if they know that the hubs have been modified. At least no one I know would. Such a modification probably wouldn't pass street inspection in most countries.

The only way to do it and be remotely sensible would be a custom milled hub that is FEA- and real-world tested, for dynamic load and thermal (and other) conditions. With the amount of engineering to do that, you may as well just tube-frame each end and run a proprietary suspension setup.

For the amount of time and money it would take to make hubs for a different bolt pattern, you could get multiple sets of custom-built wheels in the correct pattern, in the width and offset you desire.

Changing the bolt pattern doesn't really get you a better wheel selection anyway. A bigger selection, sure, but there is no sudden abundance of quality wheels. In fact, for high quality wheels, 5x130 might have the best selection for off-the-shelf pieces and from companies that have a lot of stock.