Pavel - from the BikeBuddy web site it seems that there would be no problem mounting even bigger bottles if you order the '200 series' springs
"All three models adjust from 2.8 to 4.4 inches diameter (70 to 112mm). Where leg room is not a problem, BIKEBUDDY can be adjusted up to 6 inches (152mm) diameter by substituting the standard springs for '200' series which are available as an extra - very handy for carrying a small tent or rainwear."
