Re: Dually Wheels--Teach me!
I have honestly never dealt with any of the original running gear on a C30. If the hubs do in fact measure 4.56", I don't know if a wheel with a 4.60" bore would be an issue. As far as I know switching out the original wheels to newer non-split ring wheels isn't a problem. One thing I would suggest first, before you get too far along, is checking the differential gear ratio. Some of the C30's came with 5.13 gears, but most likely 4.57's. Either one is not very highway friendly. I would suggest first deciding if you really want to keep that differential. A swap to a Dana 70 or a 14 bolt with higher gears might be a consideration.
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