I'm 5'9" and ride a 20" 7700 FX
You can get that bike in a 25!
I've had it for 2 years now, and it is a fantastic bike.
You might be able to get a deal like i did and get one sent to you from inventory before the new models come out.
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Comedian Bill Hicks once said, "Money can't buy happiness, but it can buy a jet ski, and you never see an unhappy person riding a jet ski."