Inov8 say that the xlite 150 is their lightest, most radical, minimalist racer. Featuring a ZERO Arrow Shoc-Zone™ the 150 has a uniform 7mm midsole with no difference between heel and forefoot height. By allowing the foot to be in its natural position and by utilising the same anatomical last as the road-x™ shoes, the bare-x lite™ 150 enables your biomechanics to function optimally. The 3D Air Mesh, one piece upper has a tongue less construction but features a stretchy material on the top of the foot to ensure a secure, comfortable fit. The Fusion Sole™ consists of synthetic rubber and EVA foam that is specially blended into a unique compound before being injection moulded. Because the 150’s are an ultimate lightweight performance product anticipated durability is limited to 300 miles.
The Road-X Lite 155 is the most minimal of this initial offering. It has a 3mm heel-toe drop and a simple upper with welded TPU overlays. By eliminating the use of a traditional outsole, Inov8 uses a Fusion midsole/outsole combination, the shoe should come in around 6.0 oz.
The technique they use to make the sole does not produce the most durable shoe, it has proven to hold up to daily use and provides a great feel for the road while still delivering some protection from ground reaction forces.
The other two shoes that will join the Road-X Lite 155 in the Fall of 2011 are the Road-X 233 and Road-X 255 and these shoes will incorporate very thin rubber outsoles that provide a bit more durability but still retain a minimalist approach. The Road-X 233 should come in under 8.3 oz and will have a heel-toe drop of 6mm and the Road-X 255 should come in around 9.0 oz with a heel-toe drop of 9mm. So the idea here is to start with the 255 and progress to the 233 and then finally get into the 155. By the time you are ready to progress to a zero drop shoe, Inov8 should have you covered with the Bare-X Lite 150 and Bare-X 200..