to add to Jwest's post above about larger tires:
One reason many off-roaders "upgrade" to taller sidewall tires the larger area to aid with traction and floatation (especially when deflated), and cushioning.
The other main reason is to gain height.
Land Rovers, especially the LR3/4, overcome this need with fancy electronics (traction) and airbag suspension (height)
A 31.5/32" tire on one of these is like putting 33s on a Jeep.
One reason many off-roaders "upgrade" to taller sidewall tires the larger area to aid with traction and floatation (especially when deflated), and cushioning.
The other main reason is to gain height.
Land Rovers, especially the LR3/4, overcome this need with fancy electronics (traction) and airbag suspension (height)
A 31.5/32" tire on one of these is like putting 33s on a Jeep.