Extra Extra Extra Large Helmet Required
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URL: https://forum.bhpc.org.uk/forum_posts.asp?TID=7834
Printed Date: 26 March 2026 at 9:16pm
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Topic: Extra Extra Extra Large Helmet Required
Posted By: BarneyH
Subject: Extra Extra Extra Large Helmet Required
Date Posted: 01 October 2025 at 6:18pm
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I'm not putting this on Facebook as I don't need that degree of feedback. One of my other cycling commitments is with Tandem Trekkers a charity providing cycling for the visually impaired. One of our members has now been told he can't ride until he gets a cycling helmet that fits. He unfortunately has a very large head - circumference 66cm, this does not fit in any normal bike helmet. Is anybody able to make a specific recommendation - a few of us have done the extreme google research and have talked to a few industry people but thought it worth asking here as somebody may have solved this problem in the past. Thanks Barney |
Replies:
Posted By: KM2
Date Posted: 01 October 2025 at 7:23pm
| Hexr produced one for my son. I’m not sure if they are still trading. It was about 7 years ago. Made to measure by scanning. |
Posted By: LWaB
Date Posted: 15 October 2025 at 2:01pm
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Trek recently introduced XS and XL in some models of helmets. Trek XL helmets are nominally 60-66cm circumference. The Trek Starvos XL (and a few other models) is supposed to be in stock in the UK. Bell XL and Giro XL helmets top out at 65cm nominal.
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Posted By: LWaB
Date Posted: 15 October 2025 at 2:13pm
| Hexr helmets appear to top out at 59cm. The Miden and Sifer helmets also seems to be certified to CPSC standard (USA) only (according to https://hexr.com/products" rel="nofollow - https://hexr.com/products ) and so are not currently available for sale this side of the pond. |
Posted By: KM2
Date Posted: 22 October 2025 at 12:12pm
| Hexr via the link is nothing like the quality of the scanned and built to the scan. He cannot feel the helmet as the pressure is so low. |
Posted By: LWaB
Date Posted: 23 October 2025 at 8:42pm
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Kav is another 3D-printed cycle helmet, again USA-only but seems to be more available than Hexr. I have not been able to find out a maximum size for Kav. https://kavhelmets.com/" rel="nofollow - https://kavhelmets.com/
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Posted By: LWaB
Date Posted: 23 October 2025 at 8:58pm
https://www.trekbikes.com/gb/en_GB/equipment/bike-accessories/bike-helmets/road-bike-helmets/mens-road-bike-helmets/trek-starvos-wavecel-cycling-helmet/p/36951/?colorCode=yellowvisibility" rel="nofollow - https://www.trekbikes.com/gb/en_GB/equipment/bike-accessories/bike-helmets/road-bike-helmets/mens-road-bike-helmets/trek-starvos-wavecel-cycling-helmet/p/36951/?colorCode=yellowvisibility
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LWaB wrote:Posted By: BarneyH
Date Posted: 24 October 2025 at 5:11pm
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Thanks to all - especially Dave, as following his recommendation we've been working with the Trek store in Manchester and hopefully pick up the required helmet tomorrow. |
Posted By: LWaB
Date Posted: 20 December 2025 at 6:58pm
| How did the Trek helmet go? |
Posted By: BarneyH
Date Posted: 21 December 2025 at 4:15pm
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Unfortunately Trek were very obliging but the helmet was a fail. Ian's head is far too long but normal width. The Trek helmet is effectively scaled up in all directions. We're now looking at custom build either at a UK university or through American friends to procure from KAV Helmets.
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Posted By: oldandslow
Date Posted: 17 March 2026 at 9:48pm
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I signed up because my attention was drawn in another cycling forum to this thread. My head is also 66cm and long and narrow compared to the average, so I'm interested to know whether you did find a helmet to fit. I've only ever found one, and that took my local bike shop ten years to track down. It must be 20-25 years old now. I do have a Met Idolo that's a nominal 62cm, and sits rather high at the back, but gets me into events that insist on helmets, even if doesn't fit and isn't comfortable. I mostly ride without. Whether or not the things actually work, I'm massively ahead on life expectancy from riding a bike in the first place, and that dwarfs all risks, so I'm keen to keep riding (quite apart from the enjoyment). I tried a 66cm Bontrager Circuit Wavecel today. Smallest 66cm I've ever come across. Significantly smaller than that Met.
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Posted By: BarneyH
Date Posted: 18 March 2026 at 5:55pm
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We failed to find a ready made option so now are going through a lengthy process of buying a custom fit from KAV in the USA. I will do a write up for the club mag once the final helmet arrives.
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