It seems very likely the diesel TVs in the group would have little problem changing to larger tire sizes.
I had a class B; E-250, V8, automatic. I changed to a larger LT tire for the looks. Loved the look, but any highway uphill ability went into the crapper! When those tires needed replacing, I went back to the OEM (smaller) size in an LT tire. Didn't care for the looks with the smaller tires, but I hated the downshifting on moderate highway hills with the larger tire size. (Sorry. I don't have info on the various tire sizes or rear axle ratio.)
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.