The specialized purgatory tyre is the standard bearer for all mountain tyre performance by applying fe analysis to the purgatory specialized have optimised the tread to result in a faster grippier tyre for any all mountain excursions these specialized mountain bike tyres are 2bliss ready meaning they39re tubeless which minimises weight and means you won39t get any punctures with a roll faster design and expert handling performance improves with the specialized purgatory grid 2bl