Specialized S-Works Tarmac SL7 Dura-Ace Di2 review | Cycling 。People say this is the best shoe ever made - check out the reviews online! From specialized website: The S-Works 7 embodies everything we know about footwear, compacted into one shoe with no compromises and no shortcuts—just explosive speed and superior comfort. Body Geometry sole and footbed are ergonomically designed and scientifically tested to boost power, increase efficiency, and reduce the chance of injury by optimizing hip, knee, and foot alignment. Our stiffest and lightest FACT Powerline™ carbon plate maximizes power transfer: Stiffness Index 15.0 Dyneema® Mesh is trapped between layers of four-way stretch mesh and TPU to create no-stretch zones for the ultimate connection and comfort. Independent alloy BOA® S3-Snap Fit System for on-the-fly micro-adjustment, backed by the Boa Guarantee. PadLock™ heel construction cradles the heel and is proven to improve acceleration Titanium alloy cleat nuts can rotate to position pedal/cleats 5mm rearward. Non-slip, replaceable heel tread with internally recessed screws for security. Form Fit last with a roomy toe box for the ultimate in connectivity and comfort. Three-bolt cleat pattern fits all major road pedals. Approximate weight: 224g (1/2 pair, Size 42)