Clincher: These tyres are the most common type and are currently sold with almost every new bike. Clincher tyres require a tube, which, sits in between the wheel rim and the tyre to inflate and hold air. In the event of a puncture, this inner tube can easily be replaced or patched. Clincher tyres feature either steel (aka: wire) or a kevlar fibre bead (aka: folding) on their side, which hooks underneath the ridges of a wheel rim to hold the tyre in place.
Tubular: These tyres are popular with professional riders for the performance benefits they provide, but less popular with recreational riders due to their lack of everyday functionality. Tubular tyres still utilise an inner tube but it is sewn into the tyre rather than sitting separately from it like a clincher, as a result, tubular tyres need to be stuck to the wheel via glue or special tape. The key benefit of sticking the tyre directly to the rim is that in the event of a flat, the tyre will stay on the rim, allowing the rider to continue to roll without losing control.
Tubeless: This technology has long been used in the mountain biking and cyclocross realms and is growing in popularity on the road too. As the name suggests, there is no tube with tubeless tyres, instead, it is just a tyre that hooks onto the wheel as a normal clincher would, but with much tighter tolerances to create a firmer, airtight seal. Sealant is then added into the tyre to aid in plugging small holes and splits, reducing the chance of flats. In addition to a reduction in flats, tubeless tyres provide better rolling resistance than clinchers and can be run at lower pressures, improving traction, comfort and control. It's worth noting that In order to use tubeless tyres, you'll need a compatible wheelset that will typically feature a hooked sidewall for better sealing of the tyre bead.
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