tires

I ordered a cushcore for my rear wheel... I also ordered new tires F/R. For tubeless, do I need to install the rear tire without the core first, add sealant and give it a few days to do its thing, then remove the tire, and install the cushcore? Or is there another way to do it? Thanks. Rob

Hey Everyone, I'm running a Canyon Spectral:ON and wanted to get some opinions on rim with/tire size. My current setup is: Front wheel: 29er, 30 mm internal width, 2.5 in wide tire Rear wheel: 27.5, 30 mm internal width, 2.6 in wide tire I'd like to run the tires as wide a tire as is safely...