Changing gear ratios
I'm currently riding with a 48:18 gear ratio - 72 gear inches. The thing is, I only have 3 skid spots with this ratio. I'd like to get either a 17t or 19t cog so that I don't have to worry about my tire so much, but either way, I'm going to lose or gain 4 gear inches. Is it going to make that much of a difference that I can really feel while riding, or will those 4 gear inches be something that I can easily overlook and shrug off?