1.1 Aluminum alloys, forge, heat treatment (T4–T6)

Metal treatments are grouped into alloy categories. The alloy number describes the metal mix — and broadly, how strong and durable the material is.

4130 is a steel alloy with chromium and molybdenum, often called chromoly (CrMo). Scooter parts made from 4130 are lighter, stronger and harder than regular steel.

6061 is an aluminum alloy with magnesium and silicon. It is easy to work with and weld — common in aircraft. A 6061 deck can be welded, but welding weakens the area locally. Heat treatment restores strength after welding. T6 marks the heat-treatment level; higher T-values generally mean stronger material after welding or forming.

7075 (7000 series) is a zinc alloy and one of the strongest aluminum grades used on scooters.

Heat treatment changes the metal’s properties — it can increase or restore strength after welding. Treated scooter parts are typically stronger than untreated ones.

Forging shapes metal into one solid piece. Forged parts are stronger than welded equivalents because the grain structure follows the part’s shape continuously.

Scooter decks / Headtube and neck

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The headtube is where the fork runs through and the headset sits. It connects to the deck via the neck. On a custom build you usually pick the deck first, then match fork, headset and compression to it. Replacing a deck? Your old fork may not fit the new headtube length.

Headtube length must match your fork and compression system. Most headtubes are about 10 cm (4") long.

Deck headtube angles are typically 80–85 degrees — most are 83°. A steeper angle pulls the bar closer to you; a more upright angle feels roomier and can give more direct steering. Many brands skip this spec because a longer platform often gives a roomier feel anyway.

Scooter decks / Integrated vs. standard

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Standard decks use headset cups pressed into the headtube. The cups often look different in color or finish, and the headtube looks slimmer than the cups. Standard decks work with threaded and threadless forks.

Integrated decks have the headset cups built into the headtube, so it looks wider and one piece — same color and structure throughout. Integrated decks only work with threadless forks.

Scooter decks / Width

Deck width should feel comfortable for your feet when riding and landing tricks. Riders with bigger feet often prefer wider decks. Most pro scooter decks are between 10.5 cm and 11.5 cm wide.

Scooter decks / Length

Deck length affects how much room you have on the scooter. Longer decks feel more stable; shorter decks are easier to whip around in the skatepark. Lengths range from about 48 cm to 56 cm across scooters — most pro decks sit between 50 cm and 53 cm.

Scooter decks / Foot room

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The platform is the standing area between the neck and the brake. Like deck length, foot room matters for comfort — especially if you have larger feet. Trick scooter platforms are typically around 36 cm long.

Scooter decks / Concave

Concave is the slight curve across the deck platform — borrowed from skateboarding. It helps lock your feet in and tells you where they sit without looking down. Together with griptape, it is one of your main tools for keeping your feet planted.

Scooter decks / Drop outs

Drop outs is a BMX term for the rear sections of the deck that wrap around the back wheel axle.

Scooter headset / Introduction

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Scooter headsets fall into two types: standard and integrated.

Standard headsets work with threaded and threadless forks. They use cups pressed into the headtube. Most entry-level complete scooters use a threaded headset.

Integrated headsets have the cups built into the deck headtube and only work with threadless forks. Your deck headtube determines which type you need (see above).

Scooter headset / Part by type

Every pro scooter headset stacks from the bottom up: crown race, bottom bearing, top bearing and dust cap.

Standard headsets use cups to hold the bearings in the headtube. Those cups must be pressed in with a headset press tool.

Threadless headsets use a compression ring (sometimes called a pinch ring) around the fork steerer. Threaded headsets skip the compression ring — the dust cap threads onto the fork and a lock nut holds it in place.
Integrated headsets have no separate cups — the bearings sit directly in the integrated headtube.