So I pulled the trigger on a helmet. I splurged a bit, although it was research-based splurging. It originally came down to the 100% Status, Fox Proframe and Bell Full-9. After looking into the Status more, I discovered that while conforming to most standards, it isn't MIPS, so that was a deal-breaker for me. I really didn't want to spend the money on a carbon helmet, but I looked then at the 100% Aircraft, which is $150 more, but MIPS and with better reviews regarding its comfort level and ventilation. I ruled out the Bell Full-9, which is also a very good helmet - all of these are great helmets - because it doesn't conform to the AS/NZS 2063:2008 standard. It does conform to both the BMX and DH ASTM standards as well as CPSC and EN-1078, but after looking into the AS/NZS standard I learned that the requirements for masses impacting the helmet and the safety strap remaining clasped are much more stringent under that standard than other ASTM. The Bell is supposed to be very comfortable, but also kind of hot on warm days. I also looked into the Leatt v3.0 19.3 DH helmet, thank you
@PDoz - it's also a really great helmet but I didn't like the ventilation.
So that left the Fox Proframe and the 100% Aircraft. I immediately preferred the Fox, mainly because it is $150 cheaper. I also liked the ventless design in the chin guard and the bold graphics with a matte finish. A couple of things bothered me about the Proframe, though. One was that certain race circuit owners won't allow it on their tracks, even though it technically conforms to the same standards as more conventional helmets. That got me thinking about an accident with those big open holes around it. In all likelihood, it would be fine in 99% of crashes. However, I feel there is a chance that broken glass or sharp metal bits could protrude into that area in certain crashes in an urban environment. Riders also mentioned choking on dust and small rocks when trail riding behind other riders. Another issue that came up in multiple reviews was that the pad in the front is too short to prevent the MIPS system from scraping uncomfortably on their foreheads. For $250, I expect issues like that to be worked out.
So... yeah, I can't believe I spent $400 plus tax and shipping on a helmet, but I got the 100% Aircraft helmet. Reviewers consistently said it was very comfortable, and it also has removable pads like the Bell Full-9; it is very well ventilated so it stays cool in warm weather and ascents, and conforms to AS/NZS standards like the Fox Proframe; but it also has a fully protected chin guard; and it has MIPS. It was the only helmet that checked all of the boxes I wanted checked that wasn't either a $500+ pro helmet or a moto helmet. I probably won't need them in the city, but I also picked up some matching goggles (their goggles are surprisingly affordable compared to their helmets), which I will use for trail riding, or possibly on rainy days or a steep descent on a street where I think I might want full face protection. There is some nasty road hash on the streets of San Francisco, as many streets never get swept by a street cleaner (I've actually been hit in the face with rocks and small debris while riding in the city). I'll wear my good old Casco Roadster for more leisurely rides, on the trike, et cetera. Although for fast downhill, I might still wear the 100% on the trike, I'm debating that. Rolling the trike at those speeds wouldn't be pretty. Then again, you
probably wouldn't impact the ground too hard or flip over the trike, it would mostly be a lot of sliding on asphalt. Part of the reason I got the Casco was for extra eye protection on the trike, since you're much closer to the road - I also got puffed in the face by exhaust from a motorcycle accelerating from a stop once.
Thanks for all the feedback, and keep the chat up, it has been very educational for me. I researched the Casco mainly for its excellent visor and ventilation; I didn't know anything about helmet standards before this.
Attached is some gear porn of the model/style I purchased. I timidly got the matching goggles. You should check them out if you are in the market for some, as unlike the helmets they are affordable, most riders report they don't fog when worn over glasses, and they come in a blinding array of styles. I'm kind of kicking myself I didn't get one of the crazier styles (and they have even more styles on Amazon than on their website). This particular model is called Accuri - they have another otg model and a few others besides. I've attached the style I got plus a few of my other favorites. They all kind of remind of diving equipment, and the 1990's.