Single rear systems are very popular these days, but the one problem with them is finding a way to store your repair kit. NOT ANYMORE! XLAB has designed the 1st aerodynamic repair storage bag for these systems. This design looks compact & sleek, but at the same time, can fit entire clincher repair kit. 0.39 Liter (24 cu in.) storage capacity.Aero storage can be used on Delta 300, 400, 425, 430 & Sonic.