Access Spike

Black Diamond built the Access Spike for winter trail runners, fast-packers, and alpine climbers needing dependable bite without hauling traditional, heavyweight microspikes. Constructed with 14 heat-treated stainless steel spikes connected via a low-profile elastomer harness, the device stretches smoothly over running shoes and lightweight approach boots. At eight millimeters long, the points strike an intentional middle ground between aggressive bite and low running clearance, preventing the clumsy levering sensation common to bulkier traction devices.

On hardpacked snow, crust, and flat-to-rolling sheet ice, the traction is remarkably stable. The 14-point layout positions bite directly under the heel strike and forefoot push-off zones, preserving a natural cadence on frozen singletrack. Because the teeth are slightly shorter than standard heavy-duty microspikes, transitions over exposed roots and bare rock during mixed approaches feel far less jarring. The heel pull tab makes transitions fast with gloved hands, and the elastomer retains its flex reliably in sub-zero conditions without stiffening.

While this design cuts noticeable weight and packs down into the corner of a running vest, the trade-off is penetration depth. In steep terrain, slush, or unconsolidated snow sitting on top of ice, the 8mm spikes cannot match the holding power of a true 12mm traction device or crampon. Repeated grinding across abrasive granite will also wear the lighter chain links over time. For non-technical winter travel where low weight and fluid movement are paramount, it delivers an ideal balance of grip and packability.