Big head helmet

[timbernut]

I use a protos occasionally and it gives me headaches, pretty much all the time.  That is on the loosest setting and without the back cranked up.
 
Vertex vent and Alveo vent fit perfectly fine.
 
Try before you buy if possible.

I had this problem, even nipped off end fin on rear adjustment and super glued it for better fit.... still a bit tight, then had to borrow a mates (also big fat head like mine) and it was perfect fit! Compared and adjusted as allseasons says and it’s been fine since

[Dan Maynard]

I like the idea of trying out, sadly my nearest arb supplier has closed the showroom and doing collection only.

Then I thought - have a look at the APF in September. Nope.

Luckily there isn't a rush.

[Mark Bolam]

I’m on holiday in France at the moment Dan, but luckily for you I’ve bought my Strato Vent with me.

I’ll measure the internal diameter at max adjustment tomorrow and get back to you.

 

Obviously it will be in metric because I’m in Europe.

[Mark Bolam]

Here you go Dan.

I make it between 24 and 25” circumference maxed out.

 

 

[Dan Maynard]

Climbing kit on holiday? I'm trying to work out if you've gone in the Transit (and this is why you have a crew cab) or whether you took your climbing kit with you just in case you get stuck in France for ages and have to do a few jobs whilst you're there?

Anyway, thanks for that. I'm going to measure up both the ones I have here this evening to compare.

[Mark Bolam]

Haha, knocking a few trees down at the outlaws in exchange for use of the pool and wine.

2511 maybe not the ideal forestry saw....

 

[Dan Maynard]

Sounds like a great holiday, were you logging it all up with that saw as well?

Made some measurements, I think the new one is 24-25 inch and the old one 25-26 but it's a tricky operation.

I was initially convinced the problem is the narrower shell, that is only about quarter of an inch though.

The main problem seems to be the rear strap, on the old one it had a pivot each side so it goes up and down. The new one has a special flip in and out feature but lost the pivot.

That makes it about 3/4 of an inch less from front to back, maybe not a lot but enough to make the pressure uncomfortable.

[Dan Maynard]

I think it's going to be a question of waiting till I get chance to try one out, at least I didn't buy the 3M as that seems a dud.