I've owned a Trek Valencia for many years and have only used the bike a couple of times a year at the most. I recently ventured back into cycling and discovered that the bike is a 20", and I need an 18" (medium). I really like the way the bike rides, but stopping can literally be a pain. This being said I decided to buy a new bike that fit me. I found a great deal on a 2018 Orbea Vector 30. I road the bike and it certainly does fit me better and it seems to also be tighter and smoother.

Question...My Trek has 24 gears, and the Orbea has 16. Where I live is moderately Hilly and my rides round trip at the most are less than 20 miles. All usually in an urbanish area. I'm a total neophyte when it comes to gearing. Will the loss of the 8 gears be a potential negative impact? As an adder I also road a Cannondale Quick 6. The bike was a perfect fit, but the shifting and gearing seemed pretty crappy to me.