The K2 VO2 90 Boa stands out as one of the best general-purpose fitness skates. Its 90 mm/80a wheels and ILQ-9 bearings offer a fast, smooth ride; reviewers say the boots are comfortable, if a little on the large and wide side. The Boa closure system is a particular favorite with reviewers, although you can purchase a "Pro" version with speed-laces if you prefer.
Hits all the right notes. Reviewers say that K2's VO2 90 Boa, sometimes sold as the VO2 Max 90, offers a comfortable, supportive and -- above all -- fast ride. One Amazon.com reviewer says he shaved a minute off his mile just by switching to these skates. The boots are comfortable and mold to your feet over time -- although they also run a little large and wide, and the ankle cuff is a little lower than on other recreational skates. Ventilation channels in the boot help keep your feet cool. "When you get up to higher speeds, you can feel the air flowing through," writes one Amazon.com reviewer. Meanwhile, the large wheels and fast bearings make it easy to cover rough terrain quickly.
Soft boot, big wheels. The K2 VO2 90 comes with K2's trademark soft boot, supported by a rigid frame. The Boa closure system is a favorite with many reviewers, who say they like being able to adjust the skate fit while on the move; just twist the dial to tighten the skates on your feet. If you don't like the Boa closures, the VO2 90 is also available in a "Pro" version with speed-laces (Est. $240).
Vortech cuffs and a rigid frame offer extra support and power transfer, and the 90 mm/80a wheels and ILQ-9 Classic Plus bearings make for a fast, smooth ride. Several readers comment that the wheels also hold up to heavy use and rough pavement much better than those on previous K2 models.
A handful of Amazon.com users give the K2 VO2 90 Boa an average rating of 4.8 stars out of 5. They say these skates are noticeably faster than other skates and that the Boa closure system is definitely worth the extra $50 or so it adds to the price.
Review: K2 Skate Men's VO2 Max 90 Boa Inline Skates, 10, Contributors to Amazon.com, As of April 2014
This version of the VO2 Max 90 comes with speed-laces instead of the Boa closure but is otherwise identical. A few reviewers give this version of the skate a perfect 5-star review, saying they provide a great fit and that the venting system works great.
Review: K2 Skate Men's VO2 Max 90 Inline Skates, Contributors to Amazon.com, As of April 2014
A few shoppers at InlineSkates.com give the K2 VO2 Max 90 Boa a perfect score of 5 stars out of 5. Everyone agrees the skates are fast, durable and maneuverable, and that the wheels hold up surprisingly well to heavy use.
Review: K2 VO2 Max 90 Boa Inline Skates, Contributors to InlineSkates.com, As of April 2014
A handful of reviewers offer comments, but no ratings, about the K2 VO2 Max 90 Boa at InlineWarehouse.com. One credits the boots with giving him better skating form and less lower-back pain, even though they feel a little wide on his feet.
Review: K2 VO2 Max 90 Boa Inline Skates Men's 2013, Contributors to InlineWarehouse.com, As of April 2014