Rene Herse Orondo Grade, 700c x 31 - ExtralightThe Orondo Grade, here in the Extralight casing, is a modern tubeless road tire with the performance, comfort, and ride feel that Rene Herse tires are famous for. Its rated to a maximum pressure of 90 psi (6. 2 bar)enough even for heavy riders and those who prefer a stiffer feel to their bikes. A high tech liner keeps the supple casing airtight without making the tire stiff and sluggish. Rene Herses much toted supple casing rolls smoothly over surface