Shimano SH-RC503 Cycling Shoes Race Tech Without the Race Price Boasting top-of-the-line race technology, the RC503 is a high-performance road cycling shoe without the high price tag. The breathable, lightweight upper provides all-around comfort and a superior fit, while the carbon-reinforced midsole delivers the kind of stiffness and stability you'd expect from a high-end cycling shoe. Borrowed straight from pro-level racing shoes, power-zone lacing over the toe box locks the foot down for a stable, efficient pedal stroke on every ride. Features Carbon-reinforced nylon midsole with a stiffness index of 8 for a stable, efficient pedaling platform Power-zone lacing over the toe boxfor a secure, locked-in fit BOA(R) dial closure with a Shimano-engineered lace profile for precise, on-the-fly micro-adjustment Full surround, laminated mesh upper reduces material overlap and wraps seamlessly around the foot Breathable mesh keeps feet comfortable and dry on long, sweaty rides Low stack height creates a more stable pedaling platform and reduces foot movement for better power transfer SPECIFICATIONSIntended Use Road Cycling Fit Men's - Standard Closure BOA(R) L6C dial Midsole Carbon-reinforced nylon, stiffness index 8. 0/12Upper Synthetic leather with breathable TPU mesh Cleat Compatibility3-Bolt (SPD-SL)Sizing Note Runs small due to athletic cut; sizing up is recommended Men's Shoe Sizing EUUSCM40725. 240. 57. 525. 5417-7. 525. 841. 5826. 2428. 526. 542. 58. 5-926. 943927. 243. 59. 527. 5441027. 844. 510-10. 528. 24510. 528. 545. 51128. 94611-11. 529. 346. 511. 529. 5471229. 8 | Shimano | Sh-Rc503 Cycling Shoes Men's | Size 40 In Black | Nylon