How to Grind on a Fingerboard: Board Slides and Truck Locks
Grinding on a fingerboard means sliding some part of the deck or trucks along an obstacle edge, and it's the trick family that turns a rolling toy into a proper skate simulator. There are three fundamental grinds — truck-locks, board slides and lipslides — and they behave completely differently. Truck-locks are the easiest and land the most consistently. Board slides feel skate-like but demand well-waxed ledges. Lipslides look best in videos and are the hardest to lock in cleanly. This guide covers the finger placement and approach for each.
What a grind actually is at fingerboard scale
A grind puts a specific part of the board — the trucks, the deck's underside, or the deck's edge — onto an obstacle so that the board slides along the length of the obstacle rather than rolling over it. The wheels are off the surface for the duration of the grind; the sliding surface is the trick.
At full-size skateboard scale, grinds are what happens when the trucks or deck edge lock against a curb, ledge or rail. Fingerboards work exactly the same way — a well-set-up truck can lock onto a metal rail almost identically to how a real skateboard truck locks against a curb.
Three things make grinds work: the ollie or pop that gets the board onto the obstacle, the alignment when it lands, and the surface preparation on the obstacle. Miss any one and the trick fails at that point rather than partway through.
Truck-locks — start here
A truck-lock is when one or both trucks land directly on top of an obstacle edge and the truck axles grip the edge on both sides. On a rail, the truck hangs across the metal; on a ledge, the truck sits with the axle against the edge and the wheel hanging off the far side.
This is the easiest grind family to learn because the truck itself is doing the locking. Once the truck is on the obstacle, it grips almost automatically — your finger only has to keep the deck level and provide forward push.
The two common truck-locks are the 50-50 (both trucks on the obstacle, deck parallel to it) and the 5-0 (only the back truck on, deck tilted up at the front). The 50-50 is the easiest first grind — approach the rail or ledge at a 20–30 degree angle, ollie onto it so both trucks land, hold forward momentum through the slide, and pop off the end.
Board slides — the ledge-only grind family
A board slide (or 'boardslide') puts the underside of the deck itself onto the obstacle — no truck contact. The deck slides across, with the trucks hanging off either side of the ledge or rail.
Board slides only work on obstacles with a well-waxed sliding surface. A dry wooden ledge or rail will grab the deck's underside and stop it dead. If your board slides feel like they instantly stick when they should slide, the answer is not more practice — it's more wax.
The setup: approach at a shallow angle (15–20 degrees). Ollie so the deck lands perpendicular to the obstacle, with the trucks hanging off both sides. Keep your finger centred on the deck and let momentum carry it. Pop off cleanly at the end by pressing down on the tail as you exit.
Lipslides — for videos, not for learning
A lipslide is a board slide that starts with the board rotating over the obstacle rather than under it — the deck approaches from the near side of the ledge, rotates over the top, and lands on it in board-slide position.
Lipslides look better on camera than either previous grind because the rotation is visually dramatic. But they combine everything harder: a perfectly timed 180-degree pop, exact placement over the ledge, and the same wax-dependent slide as a board slide.
Do not start here. Learn 50-50s first, then board slides, then lipslides. Attempting a lipslide as a first grind means practising three things at once and none of them well.
Wax matters more than technique on most grinds
The single most common cause of failing grinds is under-waxed obstacles. A grind that stops halfway across a ledge, or one where the deck lands correctly and then just doesn't slide, is almost always a wax problem — not a technique problem.
Rubbing a small block of skate wax along the length of the obstacle takes ten seconds. Do this before every session. On rails, wax the top and both sides where truck axles will contact. On ledges, wax the top surface where the deck bottom slides.
The reverse mistake: over-waxing. If your board flies off the far end of the ledge before you can control it, wipe the surface with a dry cloth. Thin, even coats are what you want.
Approach angle — the geometry that decides everything
The angle at which you approach an obstacle determines whether the grind is possible at all. Straight-on approaches (90 degrees to the obstacle) mean the deck has no place to slide — it just impacts and stops.
The workable range is 15–30 degrees off perpendicular. Steeper than that and the deck hits the obstacle rather than rolling along it. Shallower and you don't have enough sideways travel to engage the trick.
Practice by placing the obstacle on your desk and rolling the deck (no trick, just rolling) at different angles until you find the sweet spot where the trucks contact the obstacle cleanly. That angle is your grind approach angle, and it's the same for every truck-lock.
How to fail productively
Every rider fails hundreds of grinds while learning them. The failures cluster into a small number of patterns, and diagnosing which pattern you're in speeds up learning more than any tutorial trick can.
If the board never gets onto the obstacle: your ollie is too weak. Practice ollies to the height of the obstacle before adding the grind attempt.
If the board lands on the obstacle and immediately falls off: your approach angle is wrong (too straight or too shallow), or your landing weight is off-centre.
If the board lands and sticks: wax the obstacle, or add wax if it's already there.
If the board slides but you fall off the far end: you're not popping out. Grinds end when you press down on the tail at the end of the obstacle to lift the front trucks off — practice this as a separate motion.
The three grind families in one glance
| Grind type | What contacts the obstacle | Difficulty | Best for |
|---|---|---|---|
| 50-50 | Both trucks locked on top | Easiest — start here | Rails and ledges. Very consistent once dialled. |
| 5-0 | Back truck only, front lifted | Medium | Ledges. Style points on video. |
| Board slide | Underside of deck | Medium-hard (needs wax) | Waxed ledges only. Skate-like feel. |
| Nose/tail slide | Nose or tail underside | Hard | Waxed ledges. Rewards precision. |
| Lipslide | Deck bottom, from far side | Hardest of these | Video content, not learning. |
Frequently asked questions
What's the easiest grind to learn first?+
The 50-50 — both trucks locked onto the obstacle, deck parallel. The truck geometry does most of the locking work; your finger only has to keep the deck level and push it forward. Land ten of these before trying anything else.
Why won't my board slide across the ledge?+
Almost always wax. A dry ledge grabs the deck's underside and stops it dead. Rub a small block of skate wax along the top of the ledge, run your board across it a few times to spread the wax, then try again.
Do I need a metal rail for grinds?+
No. Wood or plastic rails work; metal rails give a more consistent slide with less wax. If you're just starting, whatever rail you already have is fine — the technique is more important than the material at this stage.
What approach angle should I use for a grind?+
15–30 degrees off perpendicular to the obstacle. Straight-on approaches don't work — the deck has no room to slide along the length. Shallow approaches (5–10 degrees) miss the trick entirely.
Do I need to know how to ollie before learning to grind?+
Yes. Every grind starts with getting the deck onto the obstacle, which is an ollie. Weak ollies mean the deck doesn't clear the top of the ledge or rail. Land clean ollies to obstacle height first.
Ready to build?
Shop precision completes, decks, molds, and hardware from the Lab.