I went from a Shimano Claris 3x8 groupset that I had been using for ten years. To the Shimano Tiagra(4700) 2x10 groupset. I only lost four gears in the change. But better components. I have also upgraded on the tires. I no longer use simple road racing tires. I use only Continental Gatorskin tires. Simple road racing tires blow too easy.