Backside 50-50 Grind

also known as: Back 50 · Backside Fifty-Fifty · Double Truck Grind

grind streetparkvert difficulty 3/10
⚑ Report an issue ✎ Propose an edit

Sign in to add this trick to your list.

roll 0° yaw 0° pitch 0° body 0°
surface obstacle

Shown for a regular-footed rider. Teal ring + arrow = the rider's facing direction; teal band = the tail; a dot is where a hand holds the board - bright yellow for the front hand, amber for the back one, which is the whole difference between a mute and an indy. Board and rider rotate independently - each follows its own component. Drag to orbit.

How it works

Both trucks grind the edge with the board parallel to the obstacle, approached with the ledge or rail behind the rider's heels. The hangers ride the corner on their axles, so friction is metal-on-concrete or metal-on-steel and stays low as long as weight is centered between both axles; leaning onto either truck alone converts it into a 5-0 or nosegrind and can stall the grind. Wax on a concrete ledge, or the self-polishing surface of a steel rail, keeps the trucks skating rather than biting. The direct descendant of the original coping grinds, and identical on pool coping where the trucks lock against the coping's round top.

Step by step

  1. Approach parallel or at a shallow angle with the obstacle on your heel side, knees compressed.
  2. Ollie high enough for both trucks to clear the edge, turning hips slightly backside so the board stays parallel to it.
  3. Set both hangers down on the edge at the same time, weight centered directly over the middle of the board.
  4. Keep ankles loose and knees bent, letting the trucks find the corner; steer micro-corrections with the shoulders, not the feet.
  5. As speed bleeds off or the end approaches, shift a touch of weight to the tail.
  6. Pop a small ollie or simply lift the nose to unweight the trucks and drop off, rolling away with knees absorbing the landing.

Body mechanics

Front footOllie position just behind the front bolts; after lock-in it stays flat over the front truck to keep it seated on the edge.
Back footCentered on the tail for the ollie in, then weight even on the tail pocket, ready to lift the nose to pop out.
ShouldersStay square with the obstacle for the whole grind; opening them rotates the board off the edge.
ArmsOut at waist height, making small counter-swings to correct lean toward or away from the ledge.
GazePick the lock-in spot on approach, then look at the end of the ledge or rail through the grind.