During the Bike Festival in Riva del Garda, the Italian manufacturer, Dean Easy, showed his new dual-chamber system. If you wanted to see it you won’t find an own stand, you had to go to the booth of the German bike manufacturer Alutech who is involved in the development and will be the exclusive distributor for Germany.
The idea behind the dual-chamber system is, to increase not only the puncture protection, but also grip and traction enormous with two air chambers in the tire. For this purpose, a small, inner chamber filled with 6-8 bar air pressure presses the tire against the rim. This reduces the risk of burping and also protects the rim from bottom outs. At the same time it makes it possible to fill the outer chamber with a significantly low air pressure (up to below 0.8 bar), which increases grip and traction in the enormous degree.
At the Dean Easy system this inner chamber is formed by a tube which strongly looks like a Tubular Road Tires – and actually this was also developed in cooperation with the experts of Tufo. With the aid of two valves, it is possible to fill the two chambers separated from each other at the desired pressure. The Assembly is pretty simple – much like mounting a tube. Just put it onto the rim and and then lock it by a screw on the valve. However, in order to enlarge the air flow you have to drill a bigger 11,5 mm valve hole into the rim. The drills required for this purpose as well as all assembly tools are included .
The Dean Easy system should be available in two versions for 27,5″ and 29″ wheels with an inner width of 21-24 mm and 25-30 mm in fall this year. The total weight per wheel is approximately 115g and the price will be around € 200 for the complete set. In this set all necessary parts and tools are included.
For more information and a list of compatible rims can be found here: deaneasy.it
Words & Pictures: Christoph Bayer