lightest and longest helmet we surveyed and the only one
with a fully faired tail. Even the underside of the tail
fairing is fully enclosed. The Spiuk Kronos is very long
and extremely light.
The most noteworthy feature is the underside of the tail
fairing which is completely enclosed. This may improve aerodynamics
of the helmet tail by creating a smoother fairing behind
the rider’s head. We don’t have wind tunnel
data on this, and be sure to read our tips for aero helmet
use on this page for more information about this.
As viewed from the front the Spiuk Kronos fits very trim
and is less bulbous than most other aero helmets.
The Spiuk Kronos is only sold in one size that is just
slightly larger than Giro's Medium but smaller than their
large. This is a good in-between sizing but runs large on
small heads that would take a Giro brand small helmet size.
The Spiuk Kronos covers the ears completely but is more
comfortable and easier to put on than any other full coverage
The Spiuk Kronos worked well with most sunglasses except
the wide earstems on the Oakley M Frame Pro which fit poorly
and were painful to wear inside the helmet.
The Spiuk has minimal vents with two small venturi slots
in the front and a unique mesh covered exhaust portal in
the tail. Jon Wojcik rode the Spiuk Krono to a 2:28:19 bike
split at the 2007 Whilrpool Steelhead Triathlon and mentioned
it was very comfortable and never got warm.
The Spiuk Kronos is the most expensive of the helmets we
surveyed but was our overall favorite due to the light weight,
comfort, ease of donning and the possible aerodynamic benefits
of the fully enclosed tail fairing (on other brand aero
helmets the bottom of the fairing is open). The elegant
microshell that surrounds the helmet is smooth, light and
appears more finished than other aero helmets.
Jon Wojcik of Bikesport at Sylvania 2007.