After a long climb, the descent on patched pavement is where the Goodyear Eagle F1 RS Tubeless Tire repays the effort by rolling fast and staying composed. This tubeless-ready road bike tire has Advanced Profile construction, in which the casing layers sit side by side rather than overlapping under the tread, so the tread flexes with less wasted energy. A UUHP compound with high-surface-area silica backs that up with grip on wet or dry pavement. What Our Gearhead(R) Experts Are Saying:"Rolling down a descent littered with road grit and the odd sliver of glass, I never felt the tire get nervous, and nothing worked its way through the tread afterward. The R:Shield belt is the reason, and the tire still felt supple over patched pavement instead of stiff."