In general terms, a rider with thick hair needs a helmet with a slightly larger size or a deeper fit, worn with the hair arranged flat and low, and the fit checked with the hair styled exactly as it will be worn on the ride. Thick hair takes up space inside a helmet, and if that space is not allowed for, the helmet will sit too high, feel tight, or slide around. The fix is usually a combination of the right size, the right hairstyle underneath, and a careful fit check — not simply forcing a too-small helmet on.
Many riders with thick hair find that helmets feel uncomfortable or never seem to sit right, and some give up and wear a helmet that is too loose because it is the only one that feels bearable. That is a poor trade, because a loose helmet may not protect the head properly in a fall. This guide explains how thick hair changes the fit, how to style hair for a helmet, and how to choose a helmet that works with your hair rather than against it.
How Does Thick Hair Change the Way a Helmet Fits?
Thick hair adds volume between the head and the helmet, and that volume changes the fit in two ways. First, it makes the head effectively larger, so a helmet in the size you would expect from a bare-head measurement may feel tight or may not sit down far enough. Second, hair is springy: it compresses under pressure and then pushes back, which can lift the helmet slightly and make it feel as though it is floating on top of the head rather than sitting on it.
The result is a helmet that sits too high on the forehead, leaves a gap at the back, or rocks from side to side when you shake your head. In general terms, the helmet should still sit level, with the front edge about two fingers’ width above the eyebrows, and it should move with your head rather than sliding on its own. If thick hair stops the helmet from sitting that low, the size or the way the hair is arranged needs to change.
How Should You Style Thick Hair Under a Helmet?
The simplest approach is to wear the hair low and flat. A low ponytail at the nape of the neck, a low braid, or hair worn loose and brushed flat all keep the volume away from the top and sides of the head, where the helmet needs to sit close. Avoid high buns, top knots, and high ponytails, because they push the helmet up and forward and leave the back of the head exposed.
If you prefer a ponytail, thread it through the gap at the back of the helmet if the design allows it, or let it sit below the helmet’s rear edge rather than bunching it inside. A braid is often a good choice for thick hair, because it keeps the hair tidy and flat and stops it from bunching under the helmet. In general terms, the aim is to keep the hair as close to the head as possible, with no lumps or knots where the helmet sits.
What Should You Look for When Choosing a Helmet?
Start by measuring your head with your hair in your usual riding style, and use that number to pick the size range. Many riders with thick hair find they need one size up from the size a bare-head measurement suggests, and that is normal: the size label is a guide, not a rule, and the fit check matters more than the number. Try helmets on with your hair styled as you will ride, and do not be surprised if the right size is larger than you expected.
Look for a helmet with a deep fit and plenty of adjustment. A helmet with a dial at the back that adjusts in small steps, and with pads in different thicknesses, gives you more room to fine-tune the fit around thick hair. Helmets with a slightly rounder or deeper shell often suit thick hair better than shallow, narrow models, because they leave more room over the crown. Some helmets also have a ponytail-friendly opening at the back, which can make a low ponytail far more comfortable.
Comfort is a useful test: a helmet that presses hard in one place, usually at the temples or the forehead, is the wrong shape for your head and hair, and another model will usually fit better. If you want to understand how some helmets handle the twisting forces that can happen in a fall, reading about what MIPS is for helmets can help you decide whether that feature is worth looking for, but it should never come before fit.
How Do You Check the Fit with Thick Hair?
Do the fit check with your hair styled exactly as you will ride, and with any cap or wrap you plan to wear. The helmet should sit level, with the front edge about two fingers’ width above the eyebrows, and it should cover the forehead and the back of the head evenly. Shake your head gently from side to side: the helmet should move with your head, not slide around on its own.
Check the straps next. The side straps should meet in a V just below each ear, and the chin strap should be snug enough that only one or two fingers fit underneath. Open your mouth wide: the helmet should pull down slightly, which shows the strap is holding it in place. If the helmet lifts when you open your mouth, the strap is too loose, or the hair is pushing the helmet up.
What Mistakes Should Riders with Thick Hair Avoid?
The most common mistake is wearing a helmet that is too small and forcing it on over a high bun or a thick ponytail. The helmet ends up sitting high on the head, the forehead is exposed, and the straps cannot be adjusted properly, which leaves the rider less protected and less comfortable. A larger size, or a lower hairstyle, is a better answer than forcing a small helmet to fit.
Finally, do not skip the helmet because fitting it is frustrating. A helmet that is hard to fit is a problem to solve, not a reason to ride without one. Trying a different model, a larger size, or a different hairstyle usually solves it, and a shop that sells helmets can often help you work through the options. The right combination is out there, and it is worth finding.
Frequently Asked Questions
Q: Should I buy a bigger helmet if I have thick hair?
A: In general terms, yes — many riders with thick hair need one size up from the size a bare-head measurement suggests. Measure your head with your hair in your usual riding style, try the helmet on in that style, and let the fit check, not the label, decide the size.
Q: What is the best hairstyle for wearing a helmet with thick hair?
A: A low ponytail, a low braid, or hair worn loose and brushed flat usually works best, because these styles keep the volume away from where the helmet sits. Avoid high buns and top knots, which push the helmet up and leave the back of the head exposed.
Q: Can I wear a cap or bandana under my helmet if I have thick hair?
A: Yes, a thin skull cap or bandana can help keep thick hair flat and tidy, but choose a thin, smooth layer and always check the fit with it on. A thick layer adds volume and can make the fit worse rather than better.
Olivia
Writer at Helmet Today, covering helmet reviews, fit and riding safety.
