Betsy, the Ohio store is also a warehouse. It'd be best to call first to make sure they're in stock, if they are, he just orders from one of the 3 order desks, pays at the cashier desk, and picks up at the pickup desk, dizzying experience the first time but man oh man you talk about a kid in a candy store! They have a pretty good size store with alot of items on display. I'm sure you can probably also order online or phone for in-store pick-up.
The only trouble I had in store is with -an fittings that showed 2 count in the catalog but were 1 count in store, but the manager made it right. Tell Dad to make sure the wheels are correct type size backspacing etc. when he picks them up. Most of the warehouse guys just match numbers and pull items from bins.
FYI they're on the eastern outskirts of Akron, I-76, mile marker 29 on the north side of the road just off the interstate. Going east you can see their sign from the interstate.