Tubeless Tire Question
 

One of my Topstone has tires that are set up tubeless. The bike has been on my smart trainer for the last year or so without have being ridden outside. I am going on a trip at the end of the month and would like to take this bike with me. What do I need to do in order to get the tires ready since the have not been rotated in a year. Thank you.

By rotated do you mean spinning like when you are riding on the road, or rotated as in swapping front and rear. No reason for the latter. Most likely a fresh shot of sealant would be in order but it they are holding pressure, maybe just take the sealant along with you and add some if you get leakage issues.

I would deflate the tire, remove the valve core, and dip a dipstick into the valve to see how much (if any) liquid sealant is remaining in the tire. If it hasn't been topped off in a year, I'm guessing it'll be pretty dry in there. If so, add sealant through the valve, using either the Stan's drip bottle or a plastic syringe. You want a couple of ounces of liquid in the tire. Once dispensed, replace the valve core, tighten it up, and inflate. Spin and bounce the tire a bit to distribute the sealant, and you're good to go.

Here's a video of the process, if that isn't clear.

Thanks for the video.

My tubeless setups all go flat after a few months of inactivity.

If I were the OP, I'd definitely remove the tires from the wheels, and clean out the old/dried up sealant first. It's likely to be one big glob in there if the wheels have been sitting for a year without moving.

After doing that, I'd clean up the wheel, check the tape job to make sure it's still good, then re-install/seat the tire and add new sealant.

Definitely remove tires and change sealant.