Welcome to Bike Forums.
+1 on what obed7 said. Your bike shop is your friend. The shop owner or manager can get you on the right bike once s/he know what your plans are. Good Luck.
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The Lord is merciful and gracious, slow to anger and abounding in steadfast love. - Psalm 103:8
I am a cyclist. I am not the fastest or the fittest. But I will get to where I'm going with a smile on my face.