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Styled for maximum airflow and go-fast good looks, the lightweight, 21-vent, women's specific Circuit WSD helmet was designed using Computational Fluid Dynamics, for an air-gobbling shape that delivers superb ventilation and unbeatable air flow.

Circuit WSD

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Features

  • Lightweight road helmet for superior performance
  • 21 CFD software enhanced vents for maximum airflow and efficiency
  • Premium, wicking fit pads
  • One-hand adjustable ZipTite fit system
  • Two sizes ensure the best fit
  • In-molded strap retention system with Lockdown strap adjusters
Part No. Certification Color Size Weight
420680 CE, CPSC Adult Light Blue / Black Elite S 20 1/2 - 22 1/8, 52 - 56cm 280g
420681 CE, CPSC Adult Light Blue / Black Elite M 22 1/8 - 23 1/2, 56 - 60cm 300g
430271 CE, CPSC Adult Silver / Light Blue / Pink Elite S 20 1/2 - 22 1/8, 52 - 56cm 280g
430272 CE, CPSC Adult Silver / Light Blue / Pink Elite M 22 1/8 - 23 1/2, 56 - 60cm 300g
Circuit WSD

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Pro Sizing

Measure the circumference of your head using a cloth tape measure or a piece of string and a ruler. Use the chart below to find the proper helmet size based on your measurement.

cm 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66
  Small                  
          Medium            
                  Large    
                      X-Large

1 Head

Take your measurement horizontally across your brow and over your ears.

Circuit WSD

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Ride it and love it. If not, we’ll take it back.

Ride it and love it. If not, we’ll take it back.

It’s that simple.

If for any reason you’re not satisfied with your Bontrager products, return the item - along with the original sales receipt - to the place of purchase within 30 days of purchase date for exchange or store credit.