The Lowe's rims don't specify what the bolt circle measurement is, so if you can't measure for it yourself, don't waste time, money, shipping, and whatever hair you can pull out in frustration.
The BMI hubs have a 2.8125" bolt circle for a 5/8" spindle. If you use them, pay the extra $1 each for both of the hardware options, then you can decide which you like better on whatever rims you use that have the 2.8125" bolt circle.
The hubs you linked on post #1 were on a 4" bolt circle for a 5/8" spindle, and that bolt circle pattern (4 lugs on 4" bolt circle) (4 x 4) happens to be my favorite. Here's some rims with various widths and the 4 x 4 bolt circle, and are 8" like the golf cart rims Denny mentioned............
8" x 3-3/4" Rim (4 on 4) | BMI Karts And Parts .............
8" x 5-3/8" Rim (4 on 4) | BMI Karts And Parts ...........
8" x 7" Rim (4 on 4) | K260080 | R-858-4 | BMI Karts And Parts . Of course, if you're willing to drop to 6" rims, you can have the split rims that I love because they don't require a tire changing unit to change tires.
NOTE: I've bought (split) 6" front rims with bearings (3/4" for my choice) already in them, and innertubes (with L-shaped stems), no hubs or bearings to buy at all. $40.46 each, total, all in, these rims right here............
AZ1035 - 6" Steel Wheel, 3-1/4" wide, 3/4" ID Bearing | Go Kart & Mini Bike Parts | MFG Supply ............. and I used these tires on them............
8-343 - 4.10 X 3.50 X 6 Stud Tire 2 Ply Tube Type | Go Kart & Mini Bike Parts | MFG Supply .............and these innertubes
8-354 - 410 X 350 X 6 Tube L-Shaped Valve Stem | Go Kart & Mini Bike Parts | MFG SupplyBTW: If you don't mind 1-piece tubeless rims that require hubs and bearings, here's the cheapest tool I know of that will change tires from 4" - 12"............
Mini-Tire Changer (harborfreight.com).