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  • Nutcase Bike Helmet for men features an injection-molded ABS shell and full-surround expanded polystyrene (EPS) protective inner foam for high-impact protection
  • 11 front, top-mounted and rear vents help keep your noggin' cool, and redesigned shape improves coverage, sits lower on the head and contours the back of the head
  • Adjust the fit with a low-profile, reflective and removable spin dial at the rear of the helmet
  • Includes a click-in visor (not pictured) and 2 sets of removable low-density polyurethane foam insert liners for refining the fit
  • Quick-release, padded chin strap provides 1-handed operation
  • The men's Nutcase Bike Helmet has reflective highlights


View all Nutcase Recreational Cycling Helmets

REI membership


Best Use Recreational Cycling
Helmet Style Skate / BMX
Shell Material Plastic
Material(s) EPS foam
Head Circumference
20.5 - 22.1 inches
22.1 - 23.6 inches
23.6 - 25.2 inches
Vents 11
Visor Yes
Weight 420 grams
Gender Men's
Rated 5 out of 5 by from Wouldn't you like to be a Pepper too? I bought the Nutcase, melon-head, cycling helmet for my eldest niece, who is beginning to spend more time riding along city streets and venturing farther from home when she's on her bike. She didn't have a helmet when visiting my parents' house and I insisted she wear one on her travels around the neighborhood. She picked the melon head model herself. I love it. I love she loves it and wants to wear it when riding. It's more expensive than entry-level models from other manufacturers, but the cost is reasonable when you think what it's designed to protect. It boasts some features lacking in other helmets, too, including the padded chinstrap and the removable soft visor. My niece rides without the visor. I love the magnetic fastener and the twist tightener to customize the fit. The helmet looks great! It's well-built and seems well-ventilated. It should provide her hours of riding comfort and give me hours of peace-of-mind knowing she's wearing it when she rides. I give it a five-star rating and recommend the brand as much as do the model helmet I bought.
Date published: 2014-08-08
Rated 1 out of 5 by from Faulty design I bought this helmet for my young son for bike riding and scootering. I had to return it twice due to the cheap plastic tightening mechanism breaking at the forward attachment point. Bottom line for this price, I expect better and for a glaring design defect to have been addressed. We ended up getting him a Bern helmet which fits better, had more complete head coverage, and a reliable simple tightening mechanism. REI had great customer service and that's why we keep coming back. I do not recommend this product.
Date published: 2016-03-14
Rated 5 out of 5 by from conversation starter! Protects my "melon" very well, comfortable, really like the magnetic clasp!
Date published: 2014-05-08
Rated 5 out of 5 by from I am a happy camper! I love this helmet! The fit is very comfortable. The padding on the inside is very comfy (they give you extra ones too). The knob in the back let's me custom fit it. The helmet doesn't jiggle around like some of the cheapr models. It's light and looks sturdy, not that I plan to tumble out of my bike anytime soon, but got to be prepared! ;-) I love the gray color too. Matches my blak and red bike!
Date published: 2016-11-14
Rated 5 out of 5 by from Comfortable fit, and stays fairly cool. This helmet gets much better ventilation than I had anticipated. It fits well with the dial in the back to tighten the fit. Hopefully I never have to test it completely.
Date published: 2016-07-16
Rated 5 out of 5 by from Great helmet all around I have two Nutcase helmets and they are great. Comfortable and I like the style. Like that the tightness is easily adjustable
Date published: 2016-11-21
Rated 5 out of 5 by from Fits my 4 year old perfectly! The buckle is great for little kids or those with limited dexterity to use! My kid loves the watermelon pattern so he always wants to wear the helmet when he's on his bike. Hopefully he gets several years out of it, with the adjustable neck & headbands.
Date published: 2016-06-28
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Could this helmet be used for winter sports? Will a winter hat fit underneath it?

Asked by: had2laf
We would not recommend using the Nutcase Bike helmet for snowsports. Bike and snow helmets are tested for different safety standards. The type of protection that you would need from a snowsports helmet will not be present on a bike helmet.
Answered by: REIservice
Date published: 2016-12-29

Are there general age guidelines for the sizes? My 8 year old neice wants a helmet like her aunts for Christmas & I have the Watermelon (for my melon =P). Maybe a S or M w/ the extra pads, but I could be WAY off. Thanks!!

Asked by: tarad21
Sizing for the Nutcase helmet is based on head circumference in inches. This information can be found in the specs tab on For example, a head measuring 22.1 - 23.6 inches would need a size medium.
Answered by: REIservice
Date published: 2015-09-20
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