I also bought a 2018 closeout from Jenson. This was my first mountain bike so my experience is limited. The price was to good to pass up even with the 26+ tires. So far I love the bike!
I have found some replacement tires and bought 2 spares and 2 more coming in this week. Universal cycles has some in stock.
My only issue so far is the seat post clamp does not like my weight. LOL However, Friday's ride was the first time it didn't slip down on me. I was ready to buy a Salsa Lip-lock to fix the issue. We will see if today's ride has solved the problem.