My typical routes include a combination of asphalt road, gravel, and groomed limestone trails so the Guidance Lines in the outsole are always picking up small rocks. The only downside to the Kinvara 12 outsole is the depth of the Guidance Lines. In other words, the toe of the shoe is less flexible than beneath the ball of the foot where dorsiflexion takes place during footstrike. In the Kinvara 12, the pattern is updated to allow for graduated levels of flex depending on location. Saucony continues to employ the chevron pattern in the forefoot outsole to provide appropriate flexibility and distribute shock evenly across the sole. However, the PWRRUN foam has proven to be Saucony’s most durable yet, and I was able to get 350 miles out of the K11, so I expect the same for version 12. The Kinvara 12 retains this feature with blown rubber located only under the big toe and lateral heel leaving the rest of the midsole exposed to ground contact. The standard Kinvara outsole employs injection blown rubber only in strategic zones on the outsole to keep the weight of the shoe down while providing optimal durability and protection in areas where the highest ground contact occurs. The heel-to-toe offset is, and I expect always will be, 4 millimeters The FORMFIT topsole remains a staple in the Kinvara line and further enhances the contoured and comfortable fit of the shoe. PWRRUN is the technology behind the smooth and responsive ride. PWRRUN continues to deliver on the Kinvara promise by striking the perfect balance between responsiveness and lightweight cushion.
Saucony’s PWRRUN platform returns in the Kinvara 12, retaining the additional 5.5mm of midsole foam that were added to the Kinvara 11 when PWRRUN made its debut. Like its predecessors, the ridge is as lightweight and responsive as ever. This very moderate increase in firmness does make the shoe feel more like a competition shoe, but I don’t think that it is actually more responsive than the Kinvara 10 or 11. I mentioned the firmer ride of the Kinvara 12 as one of very few noticeable differences between the 12 and 11. Supposedly, this design results in more aerodynamic lines. The PWRRUN midsole dovetails out from the heel of the shoe by several millimeters, mildly evoking the aesthetics pioneered by the Nike Vaporfly. The first difference I noticed in the Kinvara 12 midsole is the new shape. I did notice right away that the K12 are slightly more firm than last year’s model. No surprises there like the previous three versions of the Kinvara, these required zero break-in and the ride was as smooth and responsive. Once I finally had the correct size, I took the Kinvara 12 out for an easy run to get a feel for the ride. I even compared them to a pair of the Saucony Triumph that I have in my rotation, and they are visibly longer even though both shoes had the same size printed on the tag. I have been running in and reviewing Kinvaras for about 8 years, and this version definitely runs large, both in length and width.
SAUCONY KINVARA 10 VS 11 PROFESSIONAL
The excitement I felt about the sleek and professional looks faded when I put them on and realized they are definitely a half size larger than usual.
I love the bright, but subtle flashes of color. (In the future, black is actually colorful). Saucony’s design team makes a big first impression with the Kinvara 12’s colorways. The PWRRUN foam midsole that replaced Saucony’s EVA+ foam in version 11, returns for an encore in the Kinvara 12, although the shoe is definitely a bit firmer than in years past. It performs well as a daily trainer, speed trainer, and long run shoe. Like previous models, the Kinvara 12 is versatile and feels good on any and every run, from easy shake-outs to long threshold workouts. The Kinvara 12 maintains the same simplicity and style that we’ve come to expect from this shoe since it first hit the market in 2010.
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