In recent years, tire manufactures have come up with a bewildering array of A/T tires, with mixed results. It would be wise for a shopper to do some homework to see what works, including reading off road type forums. Since I own a Subaru Outback and a Toyota 4Runner, I am a member of forums dedicated to those vehicles. Tire discussions come up often. Brand and model loyalty often rears its ugly head, but can be educational if you can manage to tune out the rhetoric.
Not knowing the year of the original poster's Sienna, what size tires will fit is another concern. I do know, however, that around these parts there are a couple of AWD Siennas of the generation from the 2000s that run BFG All Terrain T/As. So I assume fitment of an LT rated truck tire isn't an issue on this vehicle. Since some Subaru models have become popular for overlanding, tire manufacturers are bringing out tires to fit them and handle the rigors of off roading. At any rate, I'd recommend sticking to the OEM tire size to avoid incurring clearance and handling issues.
As Kauri mentioned, LT tires are heavier and will lower your mileage. By nature of their tread design, on road handling in certain situations is compromised to varying degrees.
One could mount AT tires on dedicated wheels for those times one wishes to venture, but that would be an expensive outlay of funds. So, if the original poster doesn't think it to be in his best interest, then at the very least, I'd recommend that WilliamBevan carry a minimum of a good spare, tire changing tools, a couple cans of Fix-A-Flat and a 12v air compressor.
As far as driving some of the roads that were brought up, I think a lot of us have forgotten how far one can actually travel in 2WD. If of enough clearance, and the nature of the trail isn't too sandy, a vehicle can travel farther than we might give it credit for. But, I advise not traveling farther than you feel comfortable, and not beyond where you can turn around.
Not knowing the year of the original poster's Sienna, what size tires will fit is another concern. I do know, however, that around these parts there are a couple of AWD Siennas of the generation from the 2000s that run BFG All Terrain T/As. So I assume fitment of an LT rated truck tire isn't an issue on this vehicle. Since some Subaru models have become popular for overlanding, tire manufacturers are bringing out tires to fit them and handle the rigors of off roading. At any rate, I'd recommend sticking to the OEM tire size to avoid incurring clearance and handling issues.
As Kauri mentioned, LT tires are heavier and will lower your mileage. By nature of their tread design, on road handling in certain situations is compromised to varying degrees.
One could mount AT tires on dedicated wheels for those times one wishes to venture, but that would be an expensive outlay of funds. So, if the original poster doesn't think it to be in his best interest, then at the very least, I'd recommend that WilliamBevan carry a minimum of a good spare, tire changing tools, a couple cans of Fix-A-Flat and a 12v air compressor.
As far as driving some of the roads that were brought up, I think a lot of us have forgotten how far one can actually travel in 2WD. If of enough clearance, and the nature of the trail isn't too sandy, a vehicle can travel farther than we might give it credit for. But, I advise not traveling farther than you feel comfortable, and not beyond where you can turn around.
DAW
~When You Live in Nevada, "just down the road" is anywhere in the line of sight within the curvature of the earth.
~When You Live in Nevada, "just down the road" is anywhere in the line of sight within the curvature of the earth.