Originally Posted by
kipibenkipod
Today I went to the LBS that sold those bike, and he told me that he don't have the rear sprocket, because it has something that related to the gearing. He told me that he can find front ring that is smaller. What size of ring should I go with?
The front chainring will require you to purchase a new crank. Very expensive. The least expensive way to reduce your gears is to buy the rear cog off the internet.
You can buy the larger cog here.
http://sheldonbrown.com/harris/sturm...her-parts.html