Advice & Guides Advice: How to make sure your helmet fits correctly
You'd be surprised how many riders wear a helmet that's too big for them. Here's how to tell if a lid really fits you...
1 Feb 2022
HJC i31 - Matt Black
Lightweight APC open face helmet with sun visor, quick release mechanism and removable interior
Details£97.49
RRP £129.99 - save £32.50
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Verified Customer Reviews for HJC i31
Sizing
21 Oct 2026 by Martin K
All helmets I have owned over the years have been size M including Arai and my current Shoei Neotec. This HJC, I needed XL. Very nice quality helmet at a reasonable price.
Style: Matt Black
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Lift the lid
03 Sep 2025 by M J
Good fit from sizes given easy use and secure visor and comfortable to wear and remove
Style: Metallic Blue
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HJC I31 GREAT HELMET
27 Jul 2025 by Mac
It's a all round good helmet. Fits perfect, great for people who wear glasses, good vision all round.
It also feels light when it's on .
A great looking helmet.
Style: Matt Black
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Modern spec vintage feel
01 Jul 2025 by Anonymous
The clear visor gives great wind protection, positive staged opening allowing for fully open to fully closed .
Great for hot and cooler conditions . Jaw mounted sun visor control became 2nd nature to adjust .
Best part is the visibility it gains over the full face .
Style: Nardo Grey
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Draughty and noisey.
27 Mar 2025 by Anonymous
Having had the earlier JVC open face helmet, I found this one draughtier and noisier. The ratchet mechanism for the visor is very good but noisy in operation when you have the helmet on. The tinted integral visor doesn’t come down far enough and the bottom edge breaks through my line of vision. Not a fan of the clasp, although it works well.
All in all for the money not too bad.
As always the delivery was exceptional.
Style: Metallic Blue
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Great product Great Price
25 Feb 2025 by Simon B
Went inshore for a fitting before purchasing online. Happy with the technical spec and overall quality and price. Great starter helmet.
Style: Matt Black
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Description
HJC's new i31 open-face helmet provides the comfort and protection of a full-length, lockable external visor PLUS an internal sun visor. Both are easily adjusted into position and boast a quick release mechanism for ease of cleaning and/or replacement. Ventilation across the top of the head is supplied by a generous and adjustable top inlet vent, with an exhaust vent helping to suck the air through. With a removable and washable comfort liner, this is the perfect helmet for a cool, fresh ride.
Product Specification
Variants
Manufacturer
HJC i31 - Matt Black
- Advanced Polycarbonate Compound (APC) construction
- Lightweight, strong and impact-resistant
- Advanced channelling ventilation system
- Pinlock ready HJ-43 visor that provides 99% UV protection with anti-scratch treatment
- Dark smoke HJ-V12 sun visor pre-installed
- Moisture wicking crown and cheek pads are fully removable and washable
- Glasses grooves to accommodate eyewear
- Micro-buckle locking system
HJC's new i31 open-face helmet provides the comfort and protection of a full-length, lockable external visor PLUS an internal sun visor. Both are easily adjusted into position and boast a quick release mechanism for ease of cleaning and/or replacement. Ventilation across the top of the head is supplied by a generous and adjustable top inlet vent, with an exhaust vent helping to suck the air through. With a removable and washable comfort liner, this is the perfect helmet for a cool, fresh ride.
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