- Met have been making
bike helmets for 30 years.
In fact, last year, they
celebrated that very anniversary,
and with it came the release
of a brand new helmet.
You could say it was a culmination really,
of all those years spent in the business.
Their aim was to make the
holy grail of bike helmets,
so light, well ventilated, and aero.
The result was the Trenta,
and it's inside this box.
You want to see it?
I know you do, but this
being a GCN boxing,
I first need to inform you that
we've got one to give away.
Actually, we don't have one
to give away, we've got five,
and I'll give you details of how to enter
a little bit later on.
First though, I think it's
time to take a closer look
at the Met Trenta 3K to
give it its full name.
That, my friends, is a
rather good looking helmet.
And there is the carbon fibre,
although it's not as though you have to
exactly look hard for it,
because it's all over the helmet.
Met call it their 3K carbon technology,
3K referring to the weave.
The carbon cage is
embedded into the helmet,
the idea being that carbon's properties,
i.e its elasticity and stiffness,
allow them to reduce the density
and thickness of the EPS foam.
This, in turn, helps
them to make this helmet
a lot lighter, and I think also combine
to make a very nice low profile,
no mushroom head syndrome
going on with this thing.
How light?
Well I'm very glad you asked.
This medium size tips the
scales at 215 grammes,
so that's the first box ticked.
So what then about the ventilation?
Well, as is very plain to see, this helmet
possesses a lot of
vents, 19 to be precise,
and some of them are pretty big,
including those at the front here,
and also those at the other end.
Not very scientific
though, I will grant you.
What then if I tell you
that this helmet harnesses
the Venturi effect,
something I was talking
about only a couple of weeks ago.
To remind you, and frankly myself as well,
the principle of the
Venturi effect is that
as air volume decreases,
air velocity increases.
So, air is drawn in
through these rather large
vents at the front and the top,
it is then drawn over your head
and out of the rear of the helmet.
Thus, taking away all of the hot air
from the top of your head.
That is another box ticked.
Which leaves us with aerodynamics.
Met say that this helmet is
seven percent faster than
a benchmark helmet at
45 kilometres per hour,
and further than that,
they say that this helmet
is as fast and as aero,
as a full aero helmet
at 60ks per hour on the drops.
Perfect for the sprinters out there.
How exactly they've achieved this,
they've kept a closely guarded secret,
but I think if we take a closer look,
we can probably get some clues.
In fact, for the first point,
we don't even need to take a closer look.
I've already mentioned that this helmet
has a very low profile,
and a smaller helmet is definitely
an aerodynamic advantage.
Smaller helmets need to displace less air,
so you go faster.
The next key section is
this part at the rear,
which really comes into play
when you're down on the drops
and really tucking in.
For starters, it is very
smooth, but the really
important part is how
it transitions that air
from the top down to behind the helmet.
You see, any turbulence here,
is effectively slowing you down.
Met call it the rear deflector,
and it is inclined at
an angle of 25 degrees,
which if you have remembered
your aerodynamic lessons
from a previous video, you will know is a
very important number.
And then if we turn it,
so you can see the back,
you will notice those enormous exhausts.
They firstly combine with the
NACA vent here at the top,
to drive air flow through the helmet,
but secondly, they help to
smooth that transition of air.
That is the third box ticked.
All that leaves us with then is
the not so trifling matter of safety.
This helmet, of course,
meets all of your usual
safety standards, but on top of that,
inside here is a rather
neat retention system.
It is called the Safe-T
Orbital Fit System.
It surrounds your head
and also offers further
degrees of adjustment,
including four step vertically
and two occipitally.
And then another very neat
feature is this dedicated light.
It clips onto the aforementioned
retention system here at the rear.
Weighs just 15 grammes.
Off a full charge, which
you can do via USB,
it will last for six
hours on flashing mode,
and inside, there are six
LEDs, which is pretty cool.
Right, that is pretty
much all bases covered.
One thing I haven't mentioned yet though,
are the colours and their availability.
Firstly, you can get this
helmet in a 30th edition
special tri-color.
There's also a black
version, and then there's
this one which we had in this video.
Now I for one, like the look of them.
I know aesthetics is all
down to personal opinion,
but who doesn't love a carbon weave,
and who doesn't love
trying to win something.
Now you've been waiting
patiently for me to
let you know how you put
yourself in with a chance
of winning one of the five helmets.
Many of you will know I'm about to say
all you've got to do is click on the link
which is in the description
below this video.
Good luck with that.
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