To measure for a motorcycle helmet, you’ll need a flexible measuring tape and should measure your head circumference at its widest point, typically about 2.5cm above your eyebrows. This measurement determines your helmet size according to manufacturer sizing charts, ensuring proper protection and comfort whilst riding.
A properly fitted motorcycle helmet can mean the difference between life and death in an accident. According to our AutoPartsPro mechanics, over 60% of riders wear incorrectly sized helmets, compromising both safety and comfort. Getting the measurement right is crucial for optimal protection.
Tools and parts required
Before starting the measurement process, gather these essential items:
Tools required:
- Flexible measuring tape (fabric or vinyl)
- Mirror for self-measurement
- Notepad and pen for recording measurements
- Calculator for size conversions
Optional items:
- String or rope (if measuring tape unavailable)
- Ruler to measure string length
- Helper for accurate measurement
Safety precautions
Whilst measuring for a helmet involves minimal risk, ensure the measuring tape doesn’t restrict blood flow around your head. Take measurements when relaxed, as stress can temporarily affect head size. Never rely solely on hat sizes, as helmet sizing differs significantly from regular headwear.
Step-by-step instructions
Step 1: Position the measuring tape correctly
Place the flexible measuring tape around your head at the widest point. This is typically about 2.5cm (one inch) above your eyebrows and ears. The tape should sit level all around your head, not tilted up or down at any point.
Ensure the tape passes over the most prominent part of the back of your head. This creates the largest circumference measurement, which is essential for proper helmet sizing.
Step 2: Take the measurement
Hold the tape snugly but not tight against your head. It should be firm enough to compress your hair slightly but not indent your skin. Read the measurement where the tape overlaps.
Record this measurement in both centimetres and inches, as different manufacturers use different units. Take the measurement three times to ensure accuracy.
Step 3: Measure head length and width
Some helmet manufacturers also require length and width measurements. Measure from your forehead to the back of your head for length, and from ear to ear over the top of your head for width.
These additional measurements help determine the best helmet shape for your head profile, as heads vary significantly in shape beyond just circumference.
Step 4: Consult sizing charts
Compare your measurements to the manufacturer’s sizing chart. Each brand has slightly different sizing, so always check the specific chart for your chosen helmet model.
If your measurement falls between sizes, consider your riding style and hair thickness. Track riders often prefer slightly tighter fits, whilst touring riders may opt for more comfort.
Step 5: Verify the fit
When trying on the helmet, it should feel snug but comfortable. The helmet shouldn’t move when you shake your head vigorously, nor should it cause pressure points or headaches.
Check that the chin strap sits properly and that you can fit one finger between the strap and your chin when fastened.
Professional tip: Measure your head later in the day when it’s naturally slightly larger due to daily activities and blood flow changes. This ensures your helmet won’t feel too tight during longer rides.
Common mistakes to avoid
Many riders make critical errors when measuring for helmets. Avoid measuring over thick hair or hats, as this inflates the measurement. Don’t rely on your hat size, as helmet sizing systems differ entirely.
Never assume all manufacturers use identical sizing. A medium in one brand might be a large in another. Always check specific sizing charts for each helmet you consider.
Avoid measuring when you’re dehydrated or have just exercised, as these conditions can temporarily affect head size. Take measurements when you’re in a normal, relaxed state.
Expert insight: Our AutoPartsPro specialists recommend trying helmets on late in the afternoon when your head is at its natural daily maximum size. This prevents purchasing a helmet that feels too tight during extended riding sessions.
When should you re-measure?
Re-measure your head every few years, as head size can change with age, weight fluctuations, or medical conditions. Significant weight loss or gain often affects head circumference.
If you experience persistent headaches or pressure points with your current helmet, re-measuring might reveal that your head size has changed. Hair style changes, particularly significant length changes, may also warrant new measurements.
Replace your helmet every five years regardless of apparent condition, as the protective materials degrade over time. This provides an excellent opportunity to re-measure and ensure optimal fit with modern additional lighting integration features.
Related measurements you should consider
When measuring for a motorcycle helmet, consider other protective gear measurements simultaneously. Measure for protective eyewear, gloves, and riding jackets to ensure complete protection coordination.
Check your motorcycle’s mirror positioning and outside mirror adjustments to ensure good visibility whilst wearing your new helmet. Some riders need to adjust mirror positions after changing helmet styles.
Consider measuring for intercom systems or sensors if you plan to integrate communication devices into your helmet setup.
Frequently asked questions
How accurate should my helmet measurement be?
Measurements should be accurate to within 2-3mm. Small variations can significantly affect comfort and safety, so take multiple measurements to ensure consistency.
Do I need different sizes for different helmet types?
Potentially yes. Full-face, modular, and open-face helmets may fit differently even with identical head measurements due to varying internal padding configurations.
Should I measure with or without glasses?
Measure without glasses, but inform the retailer if you wear them regularly. Some helmets accommodate glasses better than others through specific cheek pad designs.
How often should I replace my motorcycle helmet?
Replace helmets every five years maximum, or immediately after any impact. Even minor drops can compromise the protective foam’s integrity.
Can helmet size change with the padding break-in?
Yes, helmet padding compresses slightly over time. A properly fitted new helmet should feel snug initially, becoming more comfortable as padding conforms to your head shape.
Measuring for a motorcycle helmet requires precision and attention to detail, but the process is straightforward with the right approach. Remember that proper fit affects both safety performance and riding comfort significantly. Take time to measure accurately, consult manufacturer sizing charts carefully, and always try before buying when possible. Your head measurements, combined with quality protective gear, form the foundation of safe motorcycling practices.
Loading...
