Shimano SH-RC503E Road Shoe Pro-level design. Accessible performance. The wide-fit Shimano SH-RC503E borrows its design and technology directly from pro-level racing shoes - bringing power-zone lacing, a carbon-reinforced nylon midsole, and a surround-wrapping laminated mesh upper to riders at every level. Lower stack height reduces foot movement and creates a more stable pedaling platform for efficient power transfer from rider to road, while the seamless performance material upper wraps the foot securely without gaps or pressure points. Dual BOA(R) L6 dials provide precise, on-the-fly micro-fit adjustment, and the DYNALAST last reduces tension throughout the foot for a smoother pedal stroke and all-day comfort. Competition-proven technology at a price that doesn't require a race contract. Features Power-zone lacing over the toe box - borrowed directly from pro racing shoe design for impressive rigidity, stiffness, and foot hold throughout the ride Wide fit for riders who require a bit of extra side-to-side space Carbon-reinforced nylon midsole with lower stack height - creates a more stable pedaling platform, reduces foot movement, and increases power transfer from rider to road Laminated mesh upper with full surround wrap - seamless pattern of performance materials wraps the foot securely, reducing unwanted gaps and pressure points for a glove-like fit Dual BOA(R) L6 dials for precise, micro-adjustable closure in both directions with instant release DYNALAST last - proprietary Shimano last that reduces tension throughout the foot, promoting a smoother pedal stroke and improved comfort over long rides Supple synthetic leather and lightweight TPU mesh keep feet cool and ventilated across all conditions SPD-SL (3-bolt) cleat compatible SPECIFICATIONSClosure Type Dual BOA(R) L6 Dials + Power-Zone Lacing Upper Synthetic Leather / Laminated TPU Mesh (Surround Wrap)Midsole Carbon-Reinforced Nylon (Low Stack Height)Last DYNALASTCleat Compatibility3-Bolt, SPD-SLIntended Use Road, Training, Gran Fondo Sizing EUUS Men's CM36422. 4cm374. 523. 2cm37. 5523. 5cm385 - 5. 523. 8cm38. 55. 5 - 624. 2cm39624. 5cm39. 56. 524. 9cm40725. 2cm40. 57. 525. 5cm417 - 7. 525. 8cm41. 5826. 2cm428. 526. 5cm42. 58. 5 - 926. 9cm43927. 2cm43. 59. 527. 5cm441027. 8cm44. 510 - 10. 528. 2cm4510. 528. 5cm45. 51128. 9cm4611 - 11. 529. 2cm46. 511. 529. 5cm471229. 8cm4812. 530. 5cm Shimano Sizing Note:Cycling shoes are meant to be form-fitting and on the snug side. If between sizes, Shimano recommends sizing up. | Shimano | Sh-Rc503E Cycling Shoes Men's | Size 40 Wide In Black | Nylon