1.9" wide bicycle tyres

Designed by former World Champion and Olympic silver medalist, Sam WIlloughby, the Siren Pro is built to give BMX racers unparalleled performance on any track. It's lightweight and fast-rolling, thanks to its 120 TPI shaped casing and tubeless-ready construction all allowing for minimal ground contact when rolling in a straight line. The Siren Pro features a kevlar bead and high-pressure casing that can be inflated up to 100 PSI for ultra-low rolling resistance on smooth surfaces. With reinforced sides that keep the casing from flexing a you corner. Max pressure rating: 100 psi ###section### Product Specs WHEEL SIZE: 20" MAX PRESSURE: 100 PSI WEIGHT: 340g (11.9oz) - 385g

The Box Two 60 TPI Wire Bead Race tire was engineered with a minimalist approach to hit lofty goals for weight, traction, rolling resistance, and rebound. At its heart is a super-supple 60TPI casing where they forced in as much rubber displacing nylon as possible and skin walls were employed to reduce drag and further reduce weight. Box Two flanked the high-density casing with a tightly packed hoop of high-tensile steel wire bead. Finally, they draped this all with BMX race-specific tread that transitions from a center band with a large contact patch to directional tactile knobbies on the sides. This aggressive combination allows for maximum traction out of the gate, immense adhesion in