Just need to stay close in size, actual tire is a personal choice for the most part the big name tires you are paying for the name not better quality. There are some exceptions, Metzlers are over priced in my opinion. You need to look at speed rating and load rating. Generally the higher the speed rating the softer the compound, the softer the compound the better they grip the road but the faster they wear. If you ride aggressive you need a softer tire if you are conservative riding you probably don't need as soft a tire. As far as size goes the first number 110 is the width of the tire at it's widest point in MM then the 2nd number is a percentage of the first giving you sidewall height in MM. The 61H is load and speed rating 61 being load and H speed. Also when buying a tire the dot number tells you week and year of manufacture, the first 2 numbers are the week and the 2nd two are the year.
