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As any cyclist knows, once the speed starts getting past 20kph, it becomes that much harder to not only increase, but to maintain speed. Castelli, rocking a cycle clothing heritage that goes back to the invention of rear jersey pockets no less, developed their Aero Race 4.0 Jersey in response to this problem, with the result that wearing the Aero 4.0 can save between 10-12 watts of power at 40kph.
Now in its 6th successful iteration, the Castelli Aero Race 4.0 Jersey is a honed classic of the Italian brand's range, offering not only the aforementioned aero advantage, but a full length YKK cam-lock front zipper, a silicon rear hem that maintains jersey shape, 3 deep rear pockets and reflective detailing. Giro3 arm elastic for a flat aero fit completes the jersey.
![]() The Italian apparel brand that was the first to use lycra in cycle shorts and who thought that rear pockets would have a future. The brand that clothed Bartali, Coppi, Anquetil and Van Looy, in the process developing an understanding of ergonomics and style that would see them revered as the makers of some of the world's most beautiful performance cycle clothing. Always innovating, always riding, today Castelli continue to produce some of the most stylish, functional and perfectly formed cycle apparel in the world, and are the official clothing partner of Team Garmin-Sharp-Barracuda. 0 reviews for Castelli Aero Race 4.0 Jersey
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Got an in depth product question, or want to ask something else related to this product? Whatever your question, simple post it here, and we'll answer you faster than a speeding bullet.Castelli sizingCastelli apparel used to be very small, but over the last few seasons they have restructured their size set for a more international rider base, so the size, whilst fitted, is not overly small. Therefore, please follow the sizing chart with confidence, but if you do want a little extra room, then feel free to go up a size.
*For an accurate glove size, please measure across your flat open palm just below the fingers, then compare your measurement to the chart above. If it's a close call, go one size up or down depending on the result.
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