Stone grinding is a foundation of Boulder Nordic Sport's commitment to helping our customers get the most out of their cross-country skiing experience.

We are proud to provide grinding services to some of the top teams and athletes in the U.S., but we love to help enthusiasts, recreational skiers, masters racers, and passionate endurance athletes have faster skis than they ever thought possible!

Learn More About Stone Grinding

Get Your Skis Stone Ground

BNS Grind System

The BNS grind naming system simplifies grind selection. The system is easy: Each name starts with “S” or “C” to designate skate/classic. Two numbers follow, separated by a decimal point. The first digit corresponds to moisture and temperature range on a scale of 0 (cold/dry) to 5 (warm/wet). The second digit corresponds to snow type ranging from 0 (new/sharp) to 5 (transformed/rounded). These names bring clarity to each grind’s characteristics and also allow you to easily compare grinds relative to each other just by looking at their names.

Grinding Menus

We recommend our core grinds on the simple menu as the starting point for everyone. These broad-range structures provide a solid foundation to handle every condition, whether you have one pair of skis or 20. Our simple grind menu is based on how many pairs of skis you have in your fleet. Ninety-five percent of skiers have one, two or three pairs of skis, and we recommend different mixes of our core grinds based on how many skis you have to work with. To find the right mix of grinds for your fleet, choose skate/classic and then pick the grinds that are highlighted for the number of pairs of skis you have. Every region has unique snow conditions. Skiers in the dry Mountain West will want to adjust toward the colder end of the menu, while skiers in the Northwest and California should consider moving to the warmer end of the spectrum. We are always happy to consult with individuals and teams to make recommendations that keep your life simple but ensure you get the best we have to offer

Simple Grind Menu

Every region has unique snow conditions. Skiers in the dry Mountain West will want to adjust toward the colder end of the menu, while skiers in the Northwest and California should consider moving to the warmer end of the spectrum. We are always happy to consult with individuals and teams to make recommendations that keep your life simple but ensure you get the best we have to offer.

With more performance data on the S2.2 grind, it has made our core skate grind menu. We also moved our core grinds toward the finer end of the scale, providing broader-range solutions that can be modified by hand structure. Everyone from ski manufacturers to national teams seems to be migrating toward this approach, so we are confident that these new core grinds are the best choices. We have two other grinds that are almost in our skate core: For extreme cold, we recommend S0.3. For wet conditions, S4.2 is an excellent choice. For a skier in the Rockies, S0.3, S1.3, and S2.2 would be a great setup for three pairs of skis, while east- and west-coast skiers might go warmer with S1.3, S2.2 and S3.2/ S4.2.

 

Full Grind Menu