Nimbus 2The Nimbus 2 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 on the road or bike path. Casing: 30 TPI Bead: Wire Compound: 60a Flat Protection: Flak Jacket 24 x 1. 5", psi 35 65 26 x 1. 5", psi 35 65 700 x 32mm, psi 75 100 700 x 35mm, psi 50 80 700 x 38mm, psi 50 80