BSD ALEX D Donnastreet Tyre Black 20 X 2.3 training new Never mind the punctures Ventilated windows with perforated Never mind the punctures Works with road based on the same proven rubber and tread design as the original The folding Donnastreet tire features the same all over smoother tread for more grip and sidewalls which sit further round the side of the tire wall for better grind performance with the added benefits of the Kevlar bead making it lighter weight and foldable… – Foldable kevlar bead– Lighter weight than regular Donnastreet tire– Smooth centre for low rolling resistance– Extra grippy & super squeaky compound– Tear resistant silkworm casing– Rated up to 110 psi – Weights 638g