Available in up to four sizes for a tailored fit, Quantum features great ventilation, excellent coverage, and of course Bontrager's signature out-of-the-box comfort and incredible ease-of-use.

Features

  • In-mold composite skeleton allows a greater variation of vent shape and size
  • Micro-Manager - Fully-adjustable fit system fits a wide range of head sizes
  • Soft, comfortable, moisture-wicking and washable helmet pads
  • LockDown strap dividers - Helmet strap management made simple
  • Internal, recessed channels manage airflow through the helmet and over the head
  • Removable snap-on visor with visor port plugs
  • Crash Replacement Guarantee - Free replacement if your helmet is involved in a crash during the first year of ownership
Part No.
433032
433033
433034
501173
501174
501175
501176
501165
501166
501167
501168
434467
434468
434469

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.

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.