he proven ATAC dual-arch retention system guarantees easy engagement and dependable release in all conditions. Low spring tension of the ATAC design causes less friction in extreme conditions, and along with an optimized release angle (13° or 17°), provides consistent entry and release, allowing MTB riding with total confidence. When other pedals pre-release or jam, with ATAC you get quick and easy release when and only when you want it, no matter what the terrain may be