I’m currently 42/16, and when I’m just going straight I feel like I’m pedaling 10000 times. When I’m not even going that fast! I figured it’d just be cheaper to get a larger cog than getting a whole new crankset.(flip flop)

SO WHAT SIZE SHOULD I GET?

Also, if I get a bigger cog, would I need to add/remove a link every time I flip my wheel around, or can I just pull the wheel further back due to the horizontal dropouts?

Thanks.