Yes, depending on your bolt circle diameter. Most modern compact cranks like you probably have will take a 20 tooth granny. I just put a Vuelta 20 tooth granny on my old LX crank (58bcd). Most local shops can order you one brand or another from the distributor Quality Bicycle Parts.Redball409 said:Is there a 20 tooth chain ring available to lower the gear ratio on the 29s?
Other options? 180mm cranks? Or larger cogset?