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Item # SSO0185

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Item # SSO0185


Sucking smoothies through a wired-shut jaw is not how you want to spend your summer. Toss on the Six Six One Evo Wired Helmet to confidently boost doubles and mach through the forest without risking damage to your manly mug.

  • Ultra-durable composite fiberglass shell protects from impact without being overly heavy
  • CoolMax lining wicks moisture so you don't drown in sweat
  • Flow-through ventilation keeps your noggin cool
  • EPS padding absorbs impact

Tech Specs

Fit Adjustment:
slidelock chin
Adjustable Vents:
fiberglass, EPS (foam)
Recommended Use:
mountain biking
Manufacturer Warranty:
1 year

Size chart

Fuji Bicycles


Geometry Chart


Altamira LTD

Seat Tube


Effective Top Tube








Head Tube


Head Tube Angle


Seat Tube Angle


Bottom Bracket Drop


Chainstay Length



44 44.0cm 51.5cm


36.3cm 72.1cm


72.0 deg 75.0 deg 6.9cm 40.5cm 97.1cm
47 47.0cm 53.0cm


37.0cm 74.1cm 13.0cm 72.5 deg 74.5 deg 6.9cm 40.5cm 97.7cm
50 50.0cm 54.5cm 54.0cm 37.0cm 76.0cm 14.0cm 73.0 deg 73.5 deg 6.9cm 40.5cm 97.6cm
53 53.0cm 56.0cm 56.0cm 37.9cm 78.3cm 16.0cm 73.5 deg 73.5 deg 6.9cm 40.5cm 98.6cm
55 55.0cm 57.5cm 58.0cm 38.9cm 80.1cm 18.0cm 73.5 deg 73.5 deg 6.9cm 40.5cm 100.1cm
58 58.0cm 59.0cm 60.1cm 39.7cm 82.1cm 20.0cm 74.0 deg 73.5 deg 6.9cm 40.5cm


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Here's what others have to say...


Nice helmet, secure fit

    I don't have a lot of experience with full face helmets, but the fit of the evo wired is great. other reviewers are correct that it fits tighter around the jaw, but i didn't find it uncomfortable and didn't notice while riding. i personally like the snug, secure feeling. it was awkward to get headphones in with the helmet on, but after i did they felt fine.

    it's pretty toasty in the helmet when you're not moving (like i imagine all the full faces i haven't tried are) but cools off quickly once you start cruising. and most importantly, it matches my bike colors, otherwise i'd just wear a hat...

    My head measures at 22.75. Medium ends at...

    My head measures at 22.75. Medium ends at 22.75 and Large begins at 22.75. Which size helmet should I buy?

    Pip, It you're on the boarder, I'd size up. These do tend to fit just a bit small.


    Weird fit

    • Familiarity:I returned this product before using it

    The helmet fit my head correctly but the fit around the jaw is very tight.


    Nice Helmet didn't fit me well

    • Gender:Male
    • Familiarity:I returned this product before using it

    The 661 Evo Wired seems to be a nice helmet however it was very tight around my Jaw line. I ended up going with the 661 Comp Shifted instead.


    Great helmet

      I'm new to DH and this is my first full face, but I love it. It fits me well, vents well while riding, and most importantly functioned perfectly during a recent crash I had. Only small gripe is wished the chin strap pivoted a bit farther forward. Highly recommend.


      Steezy helmet for the dough

        Great helmet, looks sick and hopefully wont need to be used. My only beef is that Its kinda hot in the heat but what do you expect its a full face. Size chart is spot on btw.