The Nimbus 2 Sport Reflect tire features an updated tread and compound that rolls even faster and has more grip than ever before. It comes in many widths to accommodate different bikes, riding styles, and comfort levels, so it&';s the perfect choice for riding on any road or bike path. And with BlackBelt flat protection and reflective accents that increase your visibility to motorists in low-light conditions, you get an added dose of that good ol&'; peace of mind. Casing: 60 TPI Bead: Wire Compound: 60a Flat Protection: BlackBelt 26 x 1.5", psi 35-65 650b x 2.3", psi 25-50 700 x 32mm, psi 75-100 700 x 35mm, psi 50-80 700 x 38mm, psi 50-80 700 x 45mm, psi 35-65