I would like to ask the OP, exactly which Roadian CT8 HL do you have? Exact size and is it a LT preceding the size or does it have a C following the size?
Reason I ask, the ones NOT marked LT but do have the C following the size are the Euro commercial tires designed for vans. The 225/75R16C has a load capacity of 3195lbs single/3085lbs dual (at 83 psi) and was especially designed for the Ram Promaster as an alternative to the Continental Vanco, and the MICHELIN®
AGILIS® ALPIN® the only other tires available for the Promaster.
For comparison, the LT225/75R16 has a capacity of 2680lbs single/2470lbs dual, at 80 psi. Be aware, the valve stems are not designed for greater than 80 psi and the rims are most likely not either, and you need to use the load/pressure charts (which Nexen does not have on the web site, contact them for that) to adjust the pressure to the proper setting for the loads you are carrying.
So did you get the regular LT or the Euro C tire.
Charles
'03 Ram 2500 CTD, 5.9HO six speed, PacBrake Exh Brake, std cab, long bed, Leer top and 2008 Bigfoot 25B21RB.. previously (both gone) 2008 Thor/Dutchman Freedom Spirit 180 & 2007 Winnebago View 23H Motorhome.