BMX Forks – Materials, Dimensions & Installation Made Easy
The fork is a central component of any BMX – it connects the front wheel to the frame and significantly affects steering, control and stability. Depending on your riding style (street, park, flatland) and preferences, it’s important to consider materials, dimensions and construction details.
In our BMX fork category, you’ll find high-quality models made of HiTen steel, CrMo steel or aluminium – optimised for durability, low weight and precise handling.
Materials & differences in BMX forks
- HiTen steel: Durable entry-level material – heavier, but strong and affordable.
- CrMo steel: Much lighter, more flexible and durable – ideal for advanced riders.
- Aluminium: Lightweight & corrosion-resistant – great for beginners.
CrMo forks are especially popular for street and park, as they combine weight savings with high strength.
Key dimensions of a BMX fork
- Steerer tube length: Should match the head tube of your frame – standard is about 165 mm.
- Offset (rake): Usually 25 mm or 32 mm –
smaller offset = more agile, larger offset = more stable. - Axle size at dropouts: Usually 10 mm or 14 mm – important for hub and peg compatibility.
The fork bolt – what is it for?
The BMX fork bolt (also called a star nut or compression bolt) sits at the top of the steerer tube and preloads the headset bearings. It’s needed to eliminate play before tightening the stem. Make sure the thread size fits – M10 or M24 is common.
WORK-SHOP: Fork installation & headset setup
Need help installing your BMX fork? Wondering which spacers you need? Our WORK-SHOP includes step-by-step tutorials from our BMX experts on headset installation, spacers and AFFIX Rotors – ideal for every fork setup.
FAQs about BMX forks
- HiTen or CrMo – which is better?
CrMo is lighter and more durable – HiTen is affordable and ideal for beginners. - What does fork offset mean?
The distance between steering axis and axle – it affects how fast or stable the bike steers. - How long should the steerer tube be?
It should be slightly longer than the head tube to allow room for spacers and the stem. - What does the fork bolt do?
It preloads the headset before the stem is tightened – without it, you’ll have steering play. - How do I install a BMX fork?
You’ll find all guides in our WORK-SHOP – including headset, fork bolt and spacer installation.