Brake for a freestyle scooter: flex fender, how to choose one, how to brake, and how to replace it

⚡ In brief: today’s brake is a flex fender, a flexible metal plate bolted to the deck.

Choose the brake according to the deck (it must fit its mounting holes) and the wheel diameter: a brake for 100 mm wheels will not fit a 110 mm wheel, and a brake for 120 mm wheels should not be used with a smaller wheel.

The spring brake is a thing of the past; you'll only find it on cheap, old scooters.

Brake briefly and gently; to slow down from speed, it’s better to put your foot on the ground. Prolonged braking creates a flat spot on the wheel, making it unusable.

🛑 What types of brakes are there on a freestyle scooter?

The brake on a freestyle scooter is a fender above the rear wheel that you press with your heel. Today, practically only one type is used:

Flex fender (flex brake). A bent sheet-metal piece in the shape of a fender, screwed to the rear of the board with one or more screws (from above or below). It has no spring or pin: when pressed down, the metal plate bends toward the wheel, then returns to its original position when released. It is quiet, lightweight, and simple—there’s nothing to rattle. The drawback is material fatigue at the bend: after prolonged use, the sheet metal loses its elasticity or cracks, and then it is replaced. Small and lightweight children sometimes have difficulty pressing it down.

According to the material, we distinguish:

• Steel (or stainless steel): the most common and most durable. It springs back for a long time and withstands hard impacts best.
• Plastic (nylon): lighter and quieter, with a small steel plate inside that provides braking. It wears down faster and cracks more easily.
• Combination (plastic + steel): a compromise between weight and durability.

Spring brake is a thing of the past. It sits on a pin in the plate and is held above the wheel by a spring; it is tightened from the side. It has multiple parts, needs to be tightened, the spring wears out, and then the brake rattles. You’ll find it on the cheapest and older scooters. If your board has holes for a flex fender, switching to one is the first sensible upgrade.

🔍 How to choose a brake that fits the deck and wheel?

The brake must meet two requirements at once. Always choose it based on the specific board, not the scooter brand in general.

1. Board. The brake is screwed into the holes at the end of the board and follows its shape. Hole spacing, the number of bolts, and the width vary between brands and models, so a brake from one brand usually won’t fit a board from another. The safest choice is a brake from the same brand and of the same type as the board, or a universal brake whose manufacturer explicitly states which boards it fits. Do not drill new holes in the board; this will weaken it and void the warranty. If you're not sure, send us the name of the board or a photo of its back.
2. Wheel diameter. The brake is designed for 100, 110, or 120 mm. Applies:
   • 100 mm brake: 100 mm wheel only. A 110 mm wheel won't fit under it.
   • 110 mm brake: 110 mm wheel; also works with 100 mm wheels.
   • Brake for 120 mm: 120 mm wheels only. The gap above a 110 or 100 mm wheel is too large: the sheet metal has to bend further, so it will crack sooner and is easier to kick. Not recommended.

In practice: when switching from 100 mm to 110 mm wheels, you usually also need a new brake, and it must be compatible with your deck. Whether a larger wheel will also fit in the deck and fork is covered in the article Which wheel fits my fork, deck, and under the brake? Do not bend the brake “to make a larger wheel fit”: the metal plate will crack and you will lose your warranty.

🦶 How to brake properly on a freestyle scooter?

The brake on a freestyle scooter is more of an aid than the main brake. Teach a child three things:

• Slow down by putting your foot on the ground. Slow down by dragging the sole of your shoe against the ground (as if pushing off, only in reverse). You won't damage the wheel or the brake.
• Use the brake briefly and gently. It is suitable for adjusting speed, coming to a smooth stop, and performing tricks such as a manual (riding on the rear wheel). A brief slowdown of the wheel won't hurt.
• Never stomp on the brake or lock the wheel. A locked wheel wears down in one spot, creating a flat spot. The wheel then rattles while riding; it can’t be fixed, regardless of whether it was cheap or expensive. The same applies to prolonged braking downhill: the plate overheats and the wheel wears down.

A freestyle scooter isn’t designed for riding down long hills; that’s what city scooters with large wheels are for. A flat spot on the wheel is not a manufacturing defect.

🔎 The brake rattles, scrapes, or fails to stop: what should you do?

If your scooter is knocking and you’re not sure whether it’s the brake, axle, or headset, follow the diagnostic guide “Scooter rattles or knocks, or the handlebars are loose” .

🔧 How to replace the brake on a freestyle scooter?

Replacing the flex fender takes a few minutes. Tools: 3 or 4 mm Allen key for the brake bolts (depending on the manufacturer), 6 mm Allen key and, if necessary, a 13 mm wrench for the rear wheel axle.

1. Check that the new brake fits. Same brand and type as the board, correct wheel diameter. Attach it to the board and compare the holes before removing the old one.
2. Remove the rear wheel. Loosen the axle (Allen key; use a 13 mm wrench on the nut) and pull out the wheel. On some boards, the brake can be replaced without removing the wheel, but it’s easier to work on with the wheel removed.
3. Unscrew the old brake. The screws are on top of the fender or underneath the plate. If they are secured with threadlocker and cannot be loosened, do not force them, or you may strip the screw head; simply heat the screw briefly with a hair dryer.
4. Clean the mating surface on the plate of any dirt and check that the threads in the plate are not damaged.
5. Install the new brake and tighten the bolts. Use the original or supplied screws (the length must be suitable; a screw that is too long may interfere with the wheel). Tighten carefully: the screws are small, and the threads in the aluminum plate can be stripped easily. A drop of medium-strength thread-locking adhesive prevents loosening.
6. Return the wheel together with the washers and tighten the axle. The wheel must spin freely and must not rub against the brake or the plate.
7. Exam. Press the brake several times: it must return by itself and must not rest against the plate. Then lift the scooter a few centimeters off the ground, let it drop, and listen: a dull sound is fine; a rattling noise means a screw is loose.

⚠️ Most common mistakes

• Choosing the brake “by scooter brand” rather than by the deck. Even within a single brand, the openings vary. Always according to the specific board.
• 110 mm wheel for a 100 mm brake. It doesn't fit; it rubs. When switching to larger wheels, remember to consider the brake as well.
• Brake on 120 mm above the smaller wheel. It cracks and kicks at her.
• Bending the brake or drilling the plate. The sheet metal cracks, the board weakens, and the warranty is void.
• Overtightened screws. A stripped thread in an aluminum plate is an expensive repair. 3 or 4 mm Allen key, gently.
• Riding with a worn wheel. Above the small wheel, the metal sheet bends more and even the new brake cracks.
• Slamming on the brakes and prolonged braking downhill. A flat spot on a wheel that then needs to be thrown away.

❓ FAQ