jannickz

Yes, spoke hubs require specific tire and wheel bearings sizes. The hub's design and dimensions determine the compatible rim size and tire diameter. Trying to mismatch these can lead to safety hazards and handling issues. Not all demountable rims have the same inner dimensions. While they share a common design, the inner diameter and width vary depending on the specific size and application. You must choose rims compatible with the intended tire size and your specific spoke hub or you can check more bearings info at Tradebearings.

your estimate of 350 inches is very close to the actual total length of your Superliner. For a more precise measurement, you'd need to get the exact specifications for your truck model and measure the front and rear overhangs individually.