5.13 user here. Was my daily for a lot of years and I enjoyed it. I traveled all over the state. Cresting Eisenhower at 60 mph is easy on 35s.
I am surprised Edge was swaying to 4.88s. I haven't gone there in years but they're the more popular regear shop in the front range.
Maybe they were out of 5.13's but had 4.88's on the shelf.