[look 171]

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CFYQFjAB&url=http%3A%2F%2Fwww.usacycling.org%2Fforms%2Fmech anics%2FGearChart.pdf&ei=ZTMxUL-TL8iUigKdwIH4Bg&usg=AFQjCNHxHtw3a-aIRCEH1xEN30CH3BUZAQ

This will help you on the gearing. I spend a couple of hundred bucks in the back gearing and a small front ring, and be done with it then go and have fun and kill your friend on the hills.