The Giro Prolight is a very expensive bike helmet, but reviewers say it is an excellent choice for serious cyclists. Weighing just over 6 ounces, the Prolight is one of the lightest helmets you can buy. It also boasts some impressive users -- both Alberto Contador and Lance Armstrong wore the Giro Prolight in the 2009 Tour de France. Reviewers say the Prolight helmet is incredibly comfortable, and there are three sizes available to ensure a snug fit. However, reviewers are split on how easy the helmet is to adjust. One tester finds it a little cumbersome, while another calls it "extremely easy." Twenty-five vents also ensure excellent ventilation, according to reviews. However, the price tag is hard for some to swallow. If you are shopping on a budget, the Giro Stylus (Est. $85) also gets high marks for serious cyclists. It's not nearly as light or ventilated as the Giro Prolight, but it gets good reviews for its comfortable fit.
The Giro Prolight attracts a number of professional reviews, with the best analysis coming from U.K. cycling publications like Cycling Plus magazine and BikeRadar.com. Both sources test and rate the helmet and provide nicely balanced analysis. American publications like Outside and Bicycling magazines also have solid test-based reviews.
1. Cycling Plus magazine
Cycling Plus includes the Giro Prolight in an excellent group test of bike helmets. The Prolight helmet earns a perfect 5-star rating, thanks mainly to its extremely lightweight design. The fit-adjustment system also gets high marks.
Review: High-end Helmets, Editors of Cycling Plus, June 2011
2. Bicycling South Africa
The Giro Prolight also earns a recommendation from the South African edition of Bicycling magazine. "Pick one up and be amazed," says Neil Gardiner.
Review: Put a Lid on It, Neil Gardiner, March 2011
BikeRadar.com gives the Giro Prolight a 4-star rating (out of 5). James Huang says the helmet is unbelievably light and comfortable, but he thinks that some of Giro's other high-end helmets have slightly better ventilation.
Review: Giro Prolight Helmet, James Huang, Nov. 17, 2009
Road.cc, another British cycling site, also gives the Giro Prolight 4 stars out of 5. The helmet performs very well in its test, but editors say the high price tag makes it a good choice for only the most serious riders.
Review: Giro Prolight Helmet, Jon Burrage, Feb. 5, 2010
The editors of BikeRumor.com love the Roc Loc SL adjustment system used on the Giro Prolight helmet, saying it is "the most comfortable retention system I've used." Ventilation is another plus.
Review: Review: Giro Prolight Cycling Helmet, "Tyler", May 22, 2010
6. Outside Magazine
Outside magazine editors recommend the Giro Prolight in their latest buyer's guide, where reviewer John Bradley calls it "the lightest helmet on the market." Testers appreciate the sleek design, which stands in stark contrast to most cycling helmets. However, the fit can be cumbersome to adjust.
Review: Giro Prolight, John Bradley, Summer 2010
7. Bicycling Magazine
Bicycling magazine is pleased with the comfort and ventilation of the Giro Prolight helmet. The retention system also gets high marks for keeping the helmet secure, but editors note that the Prolight is not as adjustable as some other helmets.
Review: Giro Prolight Helmet, Editors of Bicycling magazine, April 2010
VeloDramatic.com is a cycling photography blog, and the site's editor has an illustrated review of the Giro Prolight helmet. Even though the adjustment system is light and minimal, this reviewer finds that it works well and keeps the helmet stable on your head.
Review: Giro Prolight Is a Good Fit, Editors of VeloDramatic.com, Not Dated