A good grind is the cornerstone of a good base structure.
The structure in the ski base determines how much friction there is between the snow and the ski, but the source of the friction varies a lot in different conditions. Wet slushy conditions have a very differently behavior than slow cold conditions. Therefore, we must adapt the structure to the different conditions.
We get the structure in the base through a grinding process that sets a pattern and with a certain depth of the pattern. This is made by a diamond, which cut lines in the grinding stone, and the grinding stone transfers this pattern to the base. When the structure is put on the base, we measure how deep the lines are cut into the base. We are calling this measured number for RA - roughness average.
Both for us and for you as a customer it’s crucial to keep control over the RA value.
Therefore, it’s the RA value that is used as the base to describe how we name our grinds. We measure the RA value on every single pair of skis and mark this number on the grinding tag. This way you can learn which type of skis and RA value will work at the different conditions.
This inspire us to be very accurate with every single pair. Grinding skis is an art, the grinding stones and the diamonds are not consistent, and the RA value can change from day to day. It requires being exact, patience and passion to be able to recreate the grind we wish, again and again.
We offer nine different grinds; five for classic - SP20, SP30, SP40. SP50 and SP60, four for skating - SP20, SP25, SP30 and SP40.
Snow humidity: 16-22%
Snow humidity: 20-30%
Snow humidity: 30-35%.
Snow humidity: 35%+
Snow humidity: 40%+
If you only have one pair of classic, then it’s usually the SP30 that’s the best choice. If you wish to have two pairs then the SP30 and the SP50 is recommended, then you are well covered for dry and wet. To add a third pair we recommend the SP40, with these three pairs the skier will have good coverage for the most common conditions.
Snow humidity: 16-25%
Snow humidity: 20-30%
Snow humidity: 25-35%
Snow humidity: 30%+
If you only have one pair of skate skis, the SP25 is often the best choice. If you wish to have two pairs it is common to have one pair with the SP25 and one pair with SP30. If you want to add more skis then it’s best to evaluate which side of the scale you want to prioritize to get the most use out of the skis.
The grinding shop
Skiplukkern has three grinding machines; two Tazzarri Albatros RP23 and one Wintersteiger Race NC. This gives us the opportunity to be both flexible and search development of new grinds, and it gives us a high capacity to grind a high volume of skis.
The grinding shop is located in Røykenveien 70 in Asker. This is where you can deliver your skis to get them grinded. We are often out picking /testing skis, so please give us a call ahead to see if we are at the shop.