I want to get a road bike because my mountain bike is giving me a saw back and is too hard to pedal. I think it’s hard to fit me a bike because my legs are larger than my upper body. The reason I get a saw back on my mountain bike is because I think the top tube on it is to long so I am reaching to the handle bars bending my back. What Road bike shoes will I need and pedals? And do you guys know what the best bike store is in Adelaide, Australia to get the best fitting bike for me.