Maybe need to invest in a wider crank set?Thanks Tom. Took a 20 mile ride this morning with my brother and his new bike. Only gripe I have about the tank I just mounted is that it is so wide that sometimes your knees can get into the sides of it when pedaling. I am thinking the 3L tank would have been perfect, but I will stick with the 4L tank and enjoy the capacity and just have to hold my knees out a bit more while pedaling. Not too big a deal, but just something I didn't consider.