• Arai

Arai Defiant ACR-4 Rear Vent - DEFIANT/REAR VENT

  • Part #: 329039
  • Manufacturer Part #: DEFIANT/REAR VENT
  • MSRP Price: $10.95
  • Our Price: $9.86
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Overview of Arai Defiant ACR-4 Rear Vent - DEFIANT/REAR VENT

  • Fits the Defiant helmet
  • The new ACR-4 flow thru exhaust vent also allows airflow to pass over and through the vent, accelerating exhaust flow from helmet interior when open, and reducing drag when closed


Specs

Fits Helmet Defiant
Type Air Vent
Units Each
Weight 0.1 lbs

Specs for Arai Defiant ACR-4 Rear Vent - DEFIANT/REAR VENT

Fits Helmet Defiant
Type Air Vent
Units Each
Weight 0.1 lbs

Arai Sizing Information

How to size
ARAI Helmets
Size Head Circumference (in) Head Circumference (cm) Hat Size
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 3/8 - 22 3/4 57-58 7 1/8 - 7 1/4
LARGE 23 1/8 - 23 1/2 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 1/8 63-64 7 7/8 - 8
ARAI OPTIONAL/REPLACEMENT LINER THICKNESS GUIDE
HELMET SIZE LINING CODE 12MM THICKNESS 10MM THICKNESS 7MM THICKNESS 5MM THICKNESS
X-SMALL II (SM) OPTIONAL OPTIONAL STANDARD OPTIONAL
SMALL II (SM) OPTIONAL OPTIONAL STANDARD OPTIONAL
MEDIUM III (MD) OPTIONAL STANDARD OPTIONAL OPTIONAL
LARGE III (MD) OPTIONAL OPTIONAL STANDARD OPTIONAL
X-LARGE IV (LG) OPTIONAL OPTIONAL STANDARD OPTIONAL
XX-LARGE IV (LG) OPTIONAL OPTIONAL OPTIONAL STANDARD
ARAI OPTIONAL/REPLACEMENT CHEEKPAD THICKNESS GUIDE
HELMET SIZE CORSAIR V RX-Q VECTOR-2 SIGNET Q VX-PRO 3 XD4
OPTIONAL 40MM - - 40MM 35MM 35MM
OPTIONAL 35MM 35MM - 35MM - -
X-SMALL (STANDARD) 30MM 30MM 30MM 30MM 25MM 25MM
SMALL (STANDARD) 30MM 30MM 30MM 30MM 25MM 25MM
MEDIUM (STANDARD) 30MM 30MM 30MM 30MM 25MM 25MM
LARGE (STANDARD) 25MM 25MM 25MM 25MM 20MM 20MM
X-LARGE (STANDARD) 25MM 25MM 25MM 25MM 20MM 20MM
XX-LARGE (STANDARD) 25MM 25MM 25MM 20MM 20MM 20MM
OPTIONAL 15MM - - 15MM 12MM 12MM
OPTIONAL 12MM - - 12MM - -
SHELL INTERIOR SHAPE* I/O I/O I/O L/O I/O I/O
*I/O - Intermediate Oval - more info
*L/O - Long Oval - more info

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Instructions and Media for Arai Defiant ACR-4 Rear Vent - DEFIANT/REAR VENT

Instructions - PDF Instructions - PDF Instructional PDF