I purchased a Brooks Champion Flyer this summer and have about 300 miles on it. It has developed a slight squeak when I hit rough ground or if I get into some heavy peddling. It has been very dry in northern Illinois and most of my riding has been on fairly dusty trails. Iím about 210 but I would think it could stand up to my girth. Any suggestions for lubing, where, and with what? Or could it be something else?