What wheel will fit my fork, deck, and brake?

⚡ In short: the wheel has to pass through three places. With a fork, a deck, and a brake.

The surest approach: measure the existing wheel (diameter and width, for example 110 × 24 mm) and buy one of the same size. A wheel like this always fits. The smaller diameter fits everywhere; a narrower wheel can fit into a wider fork with spacers. Use a larger or wider wheel only where explicitly specified by the fork and deck manufacturer.

Watch out for the brake: a 110 mm wheel will not fit under a 100 mm brake. When the wheels are enlarged, the brake changes too. If you're not sure, email us or call the store and we'll verify the size.

🚧 Which three parts limit which wheel I can use?

A freestyle scooter wheel is described by two numbers: diameter × width in millimeters, for example 110 × 24 mm. The diameters are 100, 110, and 120 mm (125 mm is hardly manufactured anymore), with widths of 24 mm (standard) and 30 mm (wider, more for street use). Each of these dimensions must pass through three points on the scooter.

1. Fork holds the front wheel. It has a maximum diameter (the space between the fork crown and the wheel) and a width between the arms that the wheel must fit within. The manufacturer lists it in the description, for example, “max. 110 × 24 mm” or “120 × 30 mm.”
2. The board holds the rear wheel between its ends (dropouts). It also has a maximum diameter (otherwise the wheel would rub against the frame) and a width between the dropouts.
3. Brake is positioned above the rear wheel and is shaped to fit a specific diameter. The 100 mm brake is shorter, and the 110 mm wheel does not fit under it; it rubs. It works the other way around: a 100 mm wheel under the brake on a 110 mm skate rolls fine, it just brakes a little less effectively. The 120 mm brakes are longer again than the 110 mm ones.

The front and rear wheels are commonly purchased in the same size. You’ll find all three limits for every fork, board, and brake in the product description; if any are missing, that’s a sign you should ask.

📏 How do I find out what wheels I have now?

The easiest way is to read it on the wheel: most manufacturers print the size on the side of the core or on the polyurethane (e.g. “110 mm” and “24 mm”). If the inscription is worn, measure:

• Diameter: measured with a ruler across the center of the wheel, from one edge of the polyurethane to the other. A worn wheel will be a few millimeters smaller than it was when new (e.g. 107 instead of 110); round up to the nearest standard.
• Width: the width of the polyurethane (tread), not the core. The standard size is 24 mm, and the wider one is 30 mm.
• Axle: the standard axle is 8 mm (bearings marked 608). If your scooter has a 12 mm axle, it uses the niche 12STD standard, mainly used by Ethic. It is not very common in the Czech Republic and is being phased out.

The second way is the product description: for a complete scooter, fork, or deck, you’ll find which wheel size it’s designed for. For sets, the wheel size is usually listed directly in the specifications.

🧩 Will a narrower wheel fit in a wider fork? And wider to narrower?

Narrower to wider, yes. A 24 mm wheel can fit in a fork or plate designed for 30 mm: the 6 mm difference is taken up by spacers (spacer rings fitted onto the axle on both sides of the wheel). Forks and plates for 30 mm usually come with spacers for 24 mm; if not, they can be purchased separately. Without spacers, the wheel would be pulled to one side when the axle was tightened, and the bearings would be damaged.

From wider to narrower, no. A 30 mm wheel will not fit into a fork or plate designed for 24 mm; it simply won’t fit between the arms. Generally, the answer is “no”; there are exceptions depending on the product, but don’t count on them. 30 mm wheels are also used less because of their weight, especially for street skating.

An 8 mm axle is standard on wheels, forks, and decks, so you usually don’t need to worry about it. Only with 12STD (12 mm axle, different bearings) does it work in one direction: a 12STD fork and deck can be fitted with standard 8 mm wheels using an adapter, but a 12STD wheel cannot be fitted onto standard 8 mm parts. Bearings are sold in sets of 4 (2 per wheel + spacer). You can find them in the bearings category; see the How to replace bearings guide for instructions.

120 mm wheels: they’re no longer used much in skateparks because of their weight; they’re better suited to street riding and taller riders. Whether they fit your fork and deck always depends on the specific product; with complete setups for children and beginners, assume they won't. You can find forks in the forks category and decks in the decks category.

🔁 I want to switch to different wheels: what do I need to replace?

A summary of all parts and their compatibility can be found in the pillar article Freestyle scooter part compatibility: what fits with what. Brakes for individual diameters can be found in the brakes category.

⚠️ Most common mistakes when replacing wheels

• Larger wheel without a new brake. 110 mm under the brake rubs against the 100 mm wheel, bending the brake and damaging the wheel as well.
• 30 mm wheel for a fork or plate with a 24 mm fitting. It doesn't fit. The other way around, yes, with spacers.
• Narrower wheel without spacers. After tightening the axle, the wheel gets pulled to one side, the bearings rub and fail after just a few rides.
• 120 mm wheels “for testing” Without checking the specific fork and board, it’s a gamble, and they’re unnecessarily heavy for a child going to the park.
• Riding on a worn-out wheel. The Flex fender brake has to bend further and cracks; braking flats make the ride bumpy.
• Unchecked axis. A loose axle is the most common cause of wheel knocking and wobbling. Tighten securely with a size 13 wrench.
• Shop by photo. The two wheels look the same and differ by 10 mm. Always dimensions in mm.

❓ FAQ