Dia-Compe Gran Compe 700 x 23c All Yellow Kevlar Bead/Folding, Road/Training Tire. Dia-Compe Gran Compe 700 x 23c All Yellow Kevlar Bead/Folding, Road/Training Tire. Open tubulars give you all the advantages of sew-up tires a smooth comfortable ride with better cornering & less rolling resistance & the convenience of easy tire changes. Open tubular construction mounts to clincher rims, soft and supple for a great ride and good grip. With a "handmade" tubular structure for superior performance and comfort over standard clincher tires. Bright solid colors that run from bead to bead.