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50-50 on a curb: the first grind, in 4 steps

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50-50 on a curb: the first grind, in 4 steps

Yaje Popson le pose les bras en croix à New York. Toi, ton board glisse trois centimètres et part sous tes pieds. Ce n'est pas un manque de niveau.

21 octobre 2026 · 6 min de lecture

Faits sourcés, ligne street 1990-2005.

Une signature collective : chaque date, chiffre ou citation a une source. Une erreur ? On corrige. Qui écrit NOSK8

June 22, 2019, Lower East Side skatepark, New York. Yaje Popson lands on the ledge, pope, and nails a backside 50‑50 with his arms crossed, in front of a crowd of skaters glued to the barriers. You, on your neighborhood curb, your board slides three centimeters and disappears under your feet. What’s he doing that you’re not?

The 50‑50 on a curb: the simplest method, in video

The 50‑50 is the first grind almost everyone learns. Your two trucks slide on the curb edge, the board stays flat, and for a second you feel like you’re floating. In the video, it looks easy. In your shoes, it’s a lot less.

The good news: when it drops, it’s almost always for one of three reasons. We’ll save those for later. First, where does this trick come from? Then the four steps, in order.

Level

Beginner

Time

Several sessions

Prerequisites

Ollie while rolling

Surface

Low, waxed curb

From '70s pool decks to Yaje Popson’s ledge

The grind started in empty pool decks in the mid‑70s. Skaters were picking up speed on the walls, and one day the trucks hit the lip and slid on it. Back then, trucks were often hooked onto too‑narrow rollerblades, so the grind wasn’t a stand‑alone trick yet.

Then the streets took over. The big jump came in the '90s: curbs, benches, ledges, rails. The 50‑50 became the gateway to all grinds. The Smith grind, the feeble, the crooked: they all start there.

The skatepark where Yaje Popson nails his 50‑50 is the Lower East Side. It was designed by Steve Rodriguez, the dude who founded 5Boro in 1996 and ran contests at the Brooklyn Banks until they shut down in 2010. That day, Jamie Foy was also in the contest. Two years later, Thrasher dropped Yaje’s “Poets” segment: New York, all the way down the street.

Yaje Popson, la part Poets - Thrasher - 2021

Also read: the 50‑50 grind, from curb to rail.

The 4 steps to your first 50‑50 on a curb

The 4 steps of the 50‑50 on a curb: placing both trucks on the edge of a module, at the San Juan de Aragón skatepark in Mexico
Step 3 in real life: both trucks locked on the edge, arms out for balance, weight right above the board. Bosque de San Juan de Aragón skatepark, Mexico, 2019. Photo: Thayne Tuason, Wikimedia Commons (CC BY 4.0)
  1. The approach: parallel to the curb

    Roll next to the curb, almost touching, about thirty centimeters away. Average speed: enough to slide, not so fast you panic. If you come in at an angle, the board will hit the curb instead of climbing it. For a first try, face the curb: you’ll see where you land.

  2. The ollie: higher than the edge

    A normal ollie, but you send it a bit toward the curb with your shoulders. The board must clear the edge, not just sit at its height. If it’s too short, the front truck hits the edge and everything stops dead.

  3. The pose: both trucks together

    You come down with both trucks on the edge at the same time. Weight centered between your feet, knees bent. Your arms open on their own—let them. Hear the metal crack? That’s the slide.

  4. The exit: land flat

    At the end of the curb, or when speed drops, lift the nose a bit and land toward the street side. All four wheels together, knees bent, and you ride. The exit is half the trick. Without it, you’ve just missed a stall.

The 3 mistakes that make you bail off the curb

The mistakes that cause a bail: the board flips off the block during the grind and the skater’s foot looks for the ground, in Mexico
The bail, caught live: the board flips off the block, the foot looks for the ground. Everyone sees this. Calle Dr Mora, Mexico, 2015. Photo: Jarek Tuszyński, Wikimedia Commons (CC BY 4.0)

The 3 mistakes that cause a bail

  • Weight on the back — you’re scared, you lean toward the street. The front truck lifts, the board flies ahead without you. Keep your shoulders above the curb and your eyes on the curb tip, not on your feet.
  • Front truck hitting — low ollie, or launched too far from the curb. The nose bangs the edge and you’re ejected. Get closer, lift higher than you think you need.
  • Board sliding toward the street — trucks set too close to the edge, or a dry curb that grabs on one side. Aim for the middle of the trucks on the edge, shoulders parallel to the curb, and ride through the wax.

A low, waxed curb, otherwise nothing

A 50-50 on a low bench in 2005: the perfect spot for a first grind, at curb height
Tom Robinson, aka Mini Badge, doing a 50-50 on a blue bench in front of his school, England, 2005. No need for higher to start. Photo: Lewis Sharman, Wikimedia Commons (CC BY 2.0)

Your first 50‑50, you do it on a low curb, at sidewalk height. The edge has to be smooth and straight, no missing concrete chunks. Rub it with some wax—a candle does the trick.

Even before you hit the road, place your board on the curb, both trucks on the edge, and climb on. Find your balance. Then push yourself gently with a hand on a wall, or have a buddy yank you. You finally feel the board slide beneath you.

That’s the step everyone skips. And that’s why everyone goes sideways the first ten times.

How long before your first real 50‑50?

It mostly hinges on your ollie. If it’s clean on the board, a few sessions usually do the trick. If it’s still wobbly, you’ve got to work on that first, not the curb.

If you’re stuck, film yourself and watch it in slow‑motion. You’ll almost always spot one of three mistakes: weight too far back, the front truck banging, or the board sliding toward the street. Fix one at a time.

And the day the metal screams along the whole curb, you’ll get why Yaje Popson throws his arms up.

Your first 50‑50, which of the three mistakes dropped it? And on which curb did you nail it? Drop it in the comments ↓

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Le lexique

  1. 1

    50-50

    Grind sur les deux trucks à la fois, le board à plat sur l'arête du curb ou du ledge.

  2. 2

    Curb

    Bordure de trottoir, ou module bas qui l'imite en skatepark : le terrain du premier grind.

  3. 3

    Stall

    Arrêt figé sur l'obstacle, sans glisser.

  4. 4

    Wax

    Cire à skate (ou bougie) passée sur l'arête pour que les trucks glissent.

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