Skateboarding. Grinds became popular in the 1980s and remained a fundamental technique in modern street and park skateboarding. Here's how to do a 50-50 on a ledge. Grinding consists of sliding the …

WebA Groove (or H-Block) Grind happens when the skate or skates are locked on a trick using the Groove in your frame (but not using the Soul plates as they would in Soul Grinds). The side(s) of the Groove you are using and the way you are facing your obstacle will determine the type of trick and whether it is Frontside or Backside (see below).