1x is awesome. you’ll never regret it. if you really want to put your mind at rest check out a gear ratio calculator. this is my favorite: http://www.bikecalc.com/gear_ratios you can plug in various rings/cassettes to see which combo gets you close to whatever setup you currently like. bear in mind, when you’re on the bike it’ll only take a few weeks to adapt to a new gear setup, and then you’ll forget all about whatever gears you think you were missing on paper.