The Synthe™ is the pinnacle of road helmet design. It offers impressive cooling power, minimal weight, supreme fit and streamlined aerodynamic efficiency. It is a true synthesis of all features a modern rider wants in a high performance road racing helmet.
The difference is clear in the wind tunnel—our extensive testing reveals that the Synthe is nearly as efficient as the fastest time trial helmets. But the Synthe’s greatest attributes are comfort and ventilation. At it’s heart you’ll find our Roc Loc Air fit system. Micro adjustments allow you to custom tune tension and fore-aft tilt with one hand and a patented design suspends the helmet over the top of the skull, allowing airflow to pass freely over your head. Cooling power is further boosted by elaborate internal channeling and a series of massive vents; the Synthe sets a new bar for ventilation.
You no longer need to choose between aerodynamics and cooling power—with Synthe you get everything, all wrapped up in a compact and sleek silhouette.
Q: HOW DO I MAKE SURE MY BIKE HELMET FITS PROPERLY?
To work properly, a bike helmet must fit right and be worn properly. In order to offer you the best value and fit possible, Giro makes helmets in many sizes, including:
Step1: (Sizing your helmet)
- Large = 59 – 63cm / 23.25 – 24.75in.
- Medium = 55 – 59cm / 21.75 – 23.25in.
- Small = 51 – 55cm / 20 – 21.75in.
- Universal Fit Adult = 54 – 61cm / 21.25 – 24in.
- Universal Fit Women = 50 – 57cm / 19.75 – 22.5in.
- Universal Fit Youth = 50 – 57cm / 19.75 – 22.5in.
- Toddler = 48 – 52cm / 18.75 – 20.5in.
– In order to determine the size you need, you can measure the circumference of your head. Simply wrap a measuring tape around your head, being sure to locate the tape just above your ears and keeping the tape level front to back. Once you’ve determined the proper size, you can check to make sure the helmet fits correctly. If the helmet you own now doesn’t fit on your head with just a little room between your head and the headband when the fit system is loose, you should replace it with one that does. You should always wear the helmet positioned low enough in the front to protect your forehead, but not so low that it hinders your vision. Once you’ve got a helmet that is the right size, and positioned it properly, you can adjust the fit as follows: Step 2: (Adjusting the straps)
– Open the Tri Loc™ adjusters on the straps. Put the helmet on and slide the straps through the adjusters until they are located comfortably under your ears, making sure there is no slack in any of the straps. Close and lock the Tri Loc adjusters. The front and rear straps should now join at a point slightly below your ears. Step 3: (Adjusting the chinstraps and buckle)
– Fasten the chinstrap buckle and tighten the straps until the helmet fits snugly. How snugly? You should be able to open your mouth wide enough to eat. Make sure the chinstrap is well back against the throat, NOT on the point of the chin. Straps worn on the point of the chin increase the chance of a helmet coming off in an accident. Make sure the loose ends of the strap pass through the rubber O-ring near the buckle. If it does not, the strap may slide loose and the helmet can come off accidentally. Always wear the helmet with the chinstrap buckle fastened and the strap pulled tight. Step 4: (Adjusting the fit pads)
– The helmet fits correctly when it is held firmly but comfortably in place by the interior fit pads and the fit system (Roc Loc® or Acu Loc™). The fit pads inside the helmet are held in place by hook and loop fasteners. You can use any combination of the different thickness pads provided with the helmet until the helmet fits firmly and comfortably on your head. Step 5: (Adjusting the tension of the fit and stabilizing system)
– Your helmet may come with either of Giro’s patented Roc Loc® or Acu Loc™ fit and stabilizing systems. These systems attach to the helmet liner with either hook and loop fasteners or by snap-fit anchors. The systems are fully adjustable and they enhance the fit and stability of your helmet, but they are not a replacement for your helmets straps.
To adjust the fit and stability system while the helmet is on your head, push the buttons on the back toward each other to tighten the fit, and away from each other to loosen the fit. You can adjust the fit even more on systems that use hook and loop fasteners (Roc Loc Mini, Roc Loc 2 or older Roc Loc 3 models) by removing the helmet from your head, detaching the headband from the hook and loop fasteners, then moving the headband towards the front of the helmet to tighten the fit, or toward the back of the helmet to loosen the fit. On systems that use the snap-fit anchors (newer Roc Loc 3 models), you can adjust the fit by removing the helmet from your head, unsnapping the headband from the liner and moving the arms forward to tighten the fit or backward to loosen the fit. Roc Loc 4 and Acu Loc equipped helmets do not offer this adjustment. For safety reasons, we recommend that you do not attempt to adjust the systems while you are riding. Step 6: (Adjusting the height of the fit and stabilizing system)
– In addition to tension adjustment, Roc Loc 3 and Roc Loc 4 systems allow you to adjust the height of the system for optimum comfort. To adjust the height, remove the helmet from your head and then slide the Roc Loc arms up or down. Experiment until you get a fit that is most comfortable. Step 7:(Checking the fit)
– Once you think the proper fit has been achieved, grab the helmet with both hands and twist it to the left and to the right. If the helmet fits properly, the skin on the forehead will move as the helmet moves. If it does not, the helmet is too loose. Also, grab the helmet with both hands and try to remove it by rolling the helmet forward and backward as far as you can. Make a serious effort. THIS IS IMPORTANT. If you can roll it off the head completely in either direction, roll it forward so far that it blocks vision, or backward far enough to expose the forehead, it doesn’t fit correctly. If you cannot adjust the helmet to fit properly according to these instructions, DO NOT USE THIS HELMET. Replace it with a different size or model. Once you are satisfied that the helmet fits correctly and that all straps are properly adjusted and tightened, take a short test ride. Pay attention to overall comfort and helmet stability while riding. Make any minor adjustments to the fit pads, straps and stability systems to improve comfort or stability.
Q: HOW DO I KNOW WHAT SIZE I AM?
Large = 59 – 63cm / 23.25 – 24.75in.\nMedium = 55 – 59cm / 21.75 – 23.25in.\nSmall = 51 – 55cm / 20 – 21.75in.\nUniversal Fit Adult = 54 – 61cm / 21.25 – 24in.\nUniversal Fit Women = 50 – 57cm / 19.75 – 22.5in.\nUniversal Fit Youth = 50 – 55cm / 19.75 – 21.75in.\nInfant = 47 – 52cm / 18.5 – 20.5in.\n\n In order to determine the size you need, you can measure the circumference of your head. Simply wrap a measuring tape around your head, being sure to locate the tape just above your ears keeping the tape level front to back. Once you’ve determined the proper size, you can check to make sure the helmet fits correctly. If the helmet you own now doesn’t fit on your head with just a little room between your head and the headband when the fit system is loose, you should replace it with one that does. You should always wear the helmet positioned low enough in the front to protect your forehead, but not so low that it hinders your vision.
Giro is an American company based in Scotts Valley, CA and is one of the leaders in high-performance protective gear and accessories for action sports. Giro's mission is to create products on the leading edge of inspired design that look, fit and feel like a part of you, and allow you to be at your best. Helmets are Giro's most manufactured and distributed item however Giro does have a more extensive product range which includes goggles, snow sport helmets, cycling gloves, cycling shoes and sunglasses.