The Roc ATAC S pedals use Time's ATAC concept: where foot retention is independent from spring tension. This gives you easy engagement and security when pedaling with quick, dependable release for safety when you need it. The self-cleaning Rocs function flawlessly in any condition thanks to an open, mud-clearing design. And, Time ATACs boast a super wide engagement window that allows for lightning-fast, no-look clip ins with a wide, stable platform that distributes pedaling pressure over a large area for comfort and maximum power transfer. Plus, they feature chromoly axles for stellar strength.