Specialized Sawtooth 2BLISS Tyre This is the cushy, grippy, puncture resistant tyre that helps make the Specialized Sequoia such a capable all-round adventure bike. The tread's sharp angles and edges hook onto any surface The tread's Gripton compound further delivers improved grip without sacrificing speed The cut resistant Endurant Casing and the BlackBelt sub tread make the Specialized Sawtooth exceptionally puncture resistant The foldable bead makes the tyre lighter weight, easier to fit and more packable if you want to carry a spare The bead is butyl wrapped to make it 2Bliss Ready - why consider going tubeless Its 700x42 size makes it suitable for many adventure, cross, touring, trekking and hybrid bikes Inflation range: 50-80psi Manufacturer's published weight: 615g 120 tpi casing TPI refers to the tyre casing's thread per inch count. The more threads per inch the better. Everything else being equal, a tyre casing with a higher TPI count, and manufactured with finer filament, will be more supple. The result? An improvement in ride quality you can immediately feel. That's why a change of tyres can be the most significant upgrade you can make on a bike. Most production bicycles come with tyres around 30 TPI. Better bikes with 60 TPI tyres. High-end ?1,000+ bikes usually have 120 TPI tyres. Pro racing tyres can be 300-500 TPI. 'The Sawtooth is THE adventure tyre of choice, developed to handle any road surface and to be tough enough to withstand the rigours of exploration. The tread offers sharp angles and edges to hook onto any surface, while the Endurant casing reinforces the sidewall for added protection and high carrying loads. Meanwhile, our legendary GRIPTON compound offers reliable grip and control, and the centre tread is reinforced for high mileage. Lastly, this iteration is set up for tubeless applications, so you're able to run lower pressures for added grip and traction, while also reducing the risk of pinch flats.' Specialized.