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HJC AC-12 Helmet - 528-622

  • Part #: 3301423S
  • Manufacturer Part #: 528-622
This item is no longer available

Overview of HJC AC-12 Helmet - 528-622

  • Snell M2005 and DOT certified
  • Advanced composite material shell is constructed using advanced fiberglass and Spectra® composite weave
  • Two-piece channeled dual-density EPS liner
  • Large eye port opening for greater visibility
  • Flow-through advanced-channeling ventilation system has dual flow-through channels, two multi-stage forehead intake vents, rear venturi exhaust spoiler and two lower exhaust vents
  • Anti-Fog system features side chin bar-mounted vortex vents that create a low-pressure vacuum effect, drawing heat and moisture out of face shield area
  • Adjustable chin vent redirects air upward and across shield interior
  • Removable AquaTrans open-cell liner quickly wicks moisture away from the skin and improves air flow
  • Streamline, wrap-around neck roll reduces wind noise
  • Two-stage pivot mechanism that compresses the shield into the eye port gasket, providing an extremely secure seal
  • Improved no-tool shield removal/installation
  • Scratch-resistant hard-coated shield mounts flush to helmet for reduced turbulence
  • Shield is rated at 95% UV resistant
  • Built-in communication system speaker cavity
  • Medium helmet weighs 3lbs., 9oz.
  • Padded D-ring retention strap

Specs for HJC AC-12 Helmet - 528-622

Age Adult
Color Matte Gray
Color - Primary Gray
Graphic Style Solid
Helmet Style Full Face
Size - Helmet Small
Units Each
Weight 5.25 lbs

Specs for HJC AC-12 Helmet - 528-622

Age Adult
Color Matte Gray
Color - Primary Gray
Graphic Style Solid
Helmet Style Full Face
Size - Helmet Small
Units Each
Weight 5.25 lbs

HJC Sizing Information

How to size
HJC - all except RPHA/FG-17/FG-JET/CL-17
INCHES CM HAT SIZE
XX-SMALL 20 - 20 1/2 51-52 6 3/8 - 6 1/2
X-SMALL 20 7/8 - 21 1/4 53-54 6 5/8 - 6 3/4
SMALL 21 5/8 - 22 55-56 6 7/8 - 7
MEDIUM 22 1/2 - 22 3/4 57-58 7 1/8 - 7 1/4
LARGE 23 1/4 - 23 5/8 59-60 7 3/8 - 7 1/2
X-LARGE 24 - 24 3/8 61-62 7 5/8 - 7 3/4
XX-LARGE 24 3/4 - 25 1/4 63-64 7 7/8 - 8
XXX-LARGE 25 5/8 - 26 65-66 8 1/8 - 8 1/4
XXXX-LARGE 26-1/4 - 26 5/8 67-68 8 3/8 - 8 1/2
HJC CL-17/ IS-17 REPLACEMENT/OPTIONAL CHEEK PADS
HELMET SIZE STD. Cheek Pad THICKNESS
XS 40MM
S 35MM
M 30MM
L 35MM
XL 30MM
XXL 25MM
XXXL 25MM
XXXXL 20MM
XXXXXL 17MM
HJC CL-17/ IS-17 REPLACEMENT/OPTIONAL HELMET LINER
HELMET SIZE SHELL SIZE/EPS SIZE STD. LINER SIZE- THICKNESS
XS M/M XS - 18MM
S M/M S - 15MM
M M/M M - 12MM
L L/L L - 18MM
XL L/L XL - 15MM
XXL L/L XXL - 12MM
XXXL L/XXXL XXXL - 15MM
XXXXL L/XXXL XXXXL - 12MM
XXXXXL L/XXXL XXXXXL - 9MM
CL-17 HELMET
INCHES CM HAT SIZE
SMALL 22 - 22 1/2 56-57 7 - 7 1/8
MEDIUM 22 7/8 - 23 1/4 58-59 7 1/4 - 7 3/8
LARGE 23 5/8 - 24 60-61 7 1/2 - 7 5/8
X-LARGE 24 3/8 - 24 3/4 62-63 7 3/4 - 7 7/8
XX-LARGE 24 3/4 - 25 1/4 63-64 7 7/8 - 8
XXX-LARGE 25 5/8 - 26 65-66 8 1/8 - 8 1/4
HJC CL-X7 REPLACEMENT/OPTIONAL CHEEK PADS/HELMET LINER
HELMET SIZE SHELL SIZE/EPS SIZE STD. CHEEK PAD THICKNESS STD. LINER SIZE- THICKNESS COMPATIBLE LINER SIZES
XS M/M 35MM XS - 12MM S - 9MM OR M - 9MM
S M/M 30MM S - 9MM XS - 12MM OR M - 9MM
M M/M 25MM M - 9MM XS - 12MM OR S - 9MM
L L/L 35MM L - 15MM XL - 12MM OR XXL - 9MM
XL L/L 30MM XXL - 12MM L - 15MM OR XXL - 9MM
XXL L/L 25MM XXL - 9MM L - 15MM OR XL - 12MM
XXXL L/XXXL 20MM XXXL - 12MM XXXXL - 9MM/XXXXXL - 7MM
XXXXL L/XXXL 17MM XXXXL - 9MM XXXL - 12MM OR XXXXXL - 7MM
XXXXXL L/XXXL 14MM XXXXXL - 7MM XXXL - 12MM OR XXXXL - 9MM
HJC FG-X REPLACEMENT/OPTIONAL CHEEK PADS
HELMET SIZE STD. Cheek Pad THICKNESS
XS 42MM
S 37MM
M 32MM
L 37MM
XL 32MM
XXL 25MM
HJC FG-X REPLACEMENT/OPTIONAL HELMET LINER
HELMET SIZE SHELL SIZE/EPS SIZE STD. LINER SIZE- THICKNESS COMPATIBLE LINER SIZES
XS M/M XS - 15MM S - 12MM OR M - 9MM
S M/M S - 12MM XS - 15MM OR M - 9MM
M M/M M - 9MM XS - 15MM OR S - 12MM
L L/L L - 15MM XL - 12MM OR XXL - 9MM
XL L/L XL - 12MM L - 15MM OR XXL - 9MM
XXL L/L XXL - 9MM L - 15MM OR XL - 12MM
HJC RPHA SERIES/FG-17/FG-JET SERIES
X-SMALL 21 1/4 - 21 5/8 54-55 6 3/4 - 6 7/8
SMALL 21 5/8 - 22 55-56 6 7/8 - 7
MEDIUM 22 1/2 - 22 7/8 57-58 7 1/8 - 7 1/4
LARGE 22 7/8 - 23 1/4 58-59 7 1/4 - 7 3/8
X-LARGE 23 5/8 - 24 60-61 7 1/2 - 7 5/8
XX-LARGE 24 3/8 - 24 3/4 62-63 7 3/4 - 7 7/8
XXX-LARGE 25 1/4 - 25 5/8 64-65 8 - 8 1/8
HJC YOUTH
SMALL/MEDIUM 19 5/8 50 6 1/4
LARGE/X-LARGE 20 1/2 52 6 1/2
HJC YOUTH
SMALL 19 1/4 - 19 3/4 49-50 6 1/8 - 6 1/4
MEDIUM 20 - 20 1/2 51-52 6 3/8 - 6 1/2
LARGE 20 7/8 - 21 1/4 53-54 6 5/8 - 6 3/4

Fitment for HJC AC-12 Helmet - 528-622

See if this part fits your ride

Part 3301423S fits the following machines

4.6 / 5.0
24 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
16
7
0
1
0
Quality
4.5 / 5
Value
4.7 / 5
Fit
Very Small
Perfect
Very Loose
Fit
Very Small
Perfect
Very Loose
Quality
5 / 5
Value
5 / 5
Great Helmet at this Price
I just have a couple days commuting under this helmet, but I am very impressed, particularly at this price. The fit, finish, and construction are first rate, like a much more expensive helmet. They eye port is large and wide. I'm able to see a lot more over my shoulder with a swivel of my head. Shield operation is slick. It has a position that is about 1/4 inch open (great for fog control), then it has a click against the seal that's like closing the window in your car. Very tight. And, just like the hype says, underway, it draws a little stream of air up into your face area. Not obnoxious, just comfortable. It doesn't mean anything to you to say it's quieter than my old helmet :-), but it's fairly quiet. With my ear plugs in, it's like being in a car. Fits a little small, I'd say. My head measures 23" exactly. I got the large and it fits snug like I like it. I wouldn't put much more cranium in a large. This is a high quality piece. At this price it's a steal. It's MUCH better looking in person than in the pictures. Ride safe.
November 3, 2009
Fit
Very Small
Perfect
Very Loose
Quality
5 / 5
Value
4 / 5
Excellent quality helmet
The ac-12 is an excellent quality helmet after reviewing and comparing closely to several other HJC helmets. The finish is flawless and very durable. No scratches after a full season of riding. The styling is very unique and has an aerodynamic ridge on the back. Really sets it apart from the rest. The noise is acceptable and the comfort is great. I did need to trim the cheek pads a bit but it was better to have too much than not enough. Just slip the foam out of the removable covering and trim to your liking. Lastly the cooling is great. No problems on hot 90 degree days. Highly recommend this one.
October 23, 2009
Fit
Very Small
Perfect
Very Loose
Quality
4 / 5
Value
5 / 5
Saved my skull
Bought one of these a few months ago. Was out for a fresh ride in the canyon. Well ended up face planting it into the side of a mountain. this helmet saved my skull. was able to get up and walk away. Bike not so much. Would recommend this to others.
July 20, 2010
Fit
Very Small
Perfect
Very Loose
Quality
4 / 5
Value
5 / 5
Looks HOT, but a fits a little small
I actually bought the AC-12 Carbon which doesn't seem to be sold anymore so my review is going toward the other AC-12's. I previously had an HJC AC-11 which I wore for 5 years. I love the look of carbon fiber so I was on the search for a replacement with a CF shell. Since the HJC is 1/2 the price of the Italian stuff and I was already wearing HJC, it seemed like a no-brainer.

I only have two (albeit small) complaints about the AC-12 Carbon. 1.) The fit seems a bit smaller than my AC-11. I went from XXL to XXL and measured my head both times. The fit around my receeding hairline is noticeably different. 2.) There is a bit of airflow around the ears that doesn't seem to be related to any of the switchable vents. My morning commute is before sunrise so I don't get the added benefit of the heat extraction.

All in all, a good helmet for a good price. It's Snell approved (and DOT if that's your thing). I would recommend it to anyone who didn't have the $$$ to buy Italian. The fit may be 8 out of 10, but the looks and value I would rate 10 out of 10!
September 15, 2010
Fit
Very Small
Perfect
Very Loose
Quality
5 / 5
Value
5 / 5
Great helmet
I had a Ac-11 before buying this one.
The AC-12 fits a little tighter, more snug than too tight. The AC12 is lighter with much better airflow than the AC-11 and a prior Bell helmet.
I ride a large cruiser without any windshield, and this helmet works good for me.
January 23, 2010
Fit
Very Small
Perfect
Very Loose
Quality
5 / 5
Value
5 / 5
I love this helmet
This is an amazing helmet. Ever so comfortable, fits perfectly. Also a great looking helmet, and very high quality.
January 20, 2011
Fit
Very Small
Perfect
Very Loose
Quality
5 / 5
Value
5 / 5
Best Deal Ever
This helmet was a great deal. The only thing is that it fits a little tight on the cheeks. It is more of a racing type helmet so I guess that should be expected. Otherwise the helmet is true to size. The quality and graphics are amazing.
October 23, 2009
Fit
Very Small
Perfect
Very Loose
Quality
5 / 5
Value
5 / 5
No Review Title Entered By User
No Review Text Entered By User
October 12, 2009
Fit
Very Small
Perfect
Very Loose
Quality
5 / 5
Value
5 / 5
No Review Title Entered By User
No Review Text Entered By User
October 12, 2009
Fit
Very Small
Perfect
Very Loose
Quality
5 / 5
Value
5 / 5
Nice Helmet
This is the best helmet I have ever owned ! Perfect fit, great airflow thru the top and very good quality.
July 20, 2010
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Instructions and Manuals for HJC AC-12 Helmet - 528-622