Torque for 15" wheels?

[Deb Mac]

Going in to look at and probably pick up an '08 2720. It has 15" wheels. Now I know from reading this forum that the recommended torque for the 14" wheels is 90 ftlb. Is it the same for the 15"? Here is the wheel, don't know if it's steel or aluminum. Owner also won't know most likely. Came to him this way, so don't know if it's an OEM upgrade, or aftermarket.

I will be pulling the wheels to check the brakes and bearings, and have everything I will need for that, but I want to make sure I'm putting the right torque on the lug nuts before I start a 1000 km trip through the Rockies (well, 1/3 of it through the Rockies).
Thanks.

 

[Wavery]

Those are standard steel trailer wheels. 90#

After driving about 100km, retorque.

 

[Deb Mac]

Excellent. Thank you. They looked like the steel wheels but I wasn't sure (haven't seen them yet) & I figured it would be the same, but wanted to check. I've done my older trailer w/ 14" a few times, but haven't had the 15" wheels before, so just needed to check with those that know!