Arbor Formula vs Arbor Westmark

How they compare

Both target all mountain terrain, while the Arbor Westmark leans more freestyle. The Arbor Formula uses a directional twin shape while the Arbor Westmark is twin. The Arbor Formula has a camber profile (arc underfoot for strong edge hold, pop, and stability on hardpack—lively and precise), while the Arbor Westmark uses rocker (lifted contact points for easier turn initiation, float in soft snow, and a catch-free feel). Both are rated 5/10 flex (medium).