Bolt Pattern and Hub Diameter for B7500 wheels

[tsp159]

Does anyone know the bolt circle and hub diameters for the B7500 wheels? I found a decent deal on a set of R4 takeoffs mounted from a B7500 and I want to see if they'll fit on my "new style" B7100 with the 6-lug hubs.

As best I can tell, the fronts are 4.5" bolt circle with a 2-5/8" hub hole and the rears are a 6" bolt circle with a 4-5/8" hub hole. Obviously, precision measured with my worst tape measure.

 

[tsp159]

So my deep Google dive seems to indicate that the B7500 front wheels for the turf application Part #6c040-50640 have a larger bolt circle pattern and hub pilot bore, with 6x4.72 and 3.5" respectively. However, it looks like the B2150/B8200/B9200 had an option for turf front wheels that would be spot on. 6x4.5 with a 2.74? hub pilot bore. Interestingly, the Google searches resulted in this little reference image found here on OTT from a few years ago. Kubota Part #32711-57420

I've also found another ancient thread here on OTT where another member had some 14" fronts off a newer machine (B26?) that has the same 6x4.72 with 3.5" bore and had his wheels slotted and a new pilot bore spacer/bushing machined.

I'm tempted to make a deal for the "wrong" wheels and try something like option #2 - but I might look for an adapter rather than machine the wheel out. More wider is more better, or something like that.

 

[N3BP]

I believe the bolt pattern is identical for all the older b-series that are 6 bolt. The rears for both machines should be lug-centric, and the fronts hub-centric. So the front hub fitment will be critical.