Having the correct tyres on your bike can make a huge difference to your riding experience. Although tyres look the same, subtle differences can have a massive effect so it’s worth spending time on deciding which tyres will suit your bike and your needs best.
Luckily all road bikes are 700c diameter so the main consideration is clincher tyres (which use a tube) or tubular tyres (a one piece tyre and tube assembly) depending on your rims. After that; width, weight, tread pattern, puncture resistance and rubber compound will determine which tyre is best for your needs.
For mountain bikes there are many things to take into consideration when purchasing tyres. Not only do you have 26”, 27.5” (650b) and 29” tyres but among that you have all sorts of widths, tread patterns, rubber compounds and tubeless options. Whichever discipline of mountain biking you do most, i.e. DH, XC or trail will impact your decision as will weather so don’t be afraid to ask questions to find the right tyre for you.
Tubeless tyre systems for mountain bikes (as the name suggests they are tyres which don’t need a tube but do need a sealant to keep them attached to the rim) have come on a great deal in the last few years and there is now a wide choice available. A good sealant and related tubeless accessories will make your life much easier.