cycling support: New Rider Purchasing used bike

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I'd like to purchase my first used road bike. My short term goal is to ride a century, although I would like to advance in the future. I've been riding my trek 7200 for the last year and average 22 miles a day I think I out grew the trek in 3 months.

I just found this used bike locally for sale that I would like to consider until I can really afford a higher end bike. I have no idea what questions to ask in purchasing or even if the bike stats are what I need to accomplish my goals. I'm not sure about the size 54cm. My trek is 44.5 cm frame and I'm 5'6" and should I only consider a womens bike. My trek is a mens.

Thank you in advance, any help would be appreciated. Ann

This GT Force
54 Cm Chromoly Frame is strong and light. Paint is Excellent
24 Speeds
Shimano RSX Integrated Shifter and Brakes
Shimano RSX Derailleurs
Shimano RSX 3 Sprocket Aluminum Crank Set
Shimano Exage Brakes
New Specialized Body Geometry seat
Araya 700 Aluminum Rims with Shimano RSX Wheel Hubs
Front and Rear Quick Release Hubs
100 - 130 PSI Tires
Look F ARC Pedals
Modolo Aluminum Handle Bars

http://images.craigslist.org/01010201020101040520070622be6963c67cc41d1c23003e39.jpg

you have posted the same thread twice, so in case you missed the other one, here's my reply

you say you are 5 6", that's about 168cm in my language - to me that bike looks rather too big for you - with a road bike you want something where you will have good standover height, a distance of a couple of cms or so between your crotch and the top bar of the bike.

There are many other important elements in sizing bike fit though, but this is a good start.

But, I would say, have a look for something more in your size - your local bike shop might give you an idea what size you need.

Have a look at this site: http://www.womenscycling.com.au/inf...?a=4&b=20&c=335 (http://www.womenscycling.com.au/inform.php?a=4&b=20&c=335)

good luck.