What to look for in a used bicycle?

Question

I don't know anything about bikes. I'm looking for a men's bike for mostly road use.

Answer 1

Arthur,  Like most purchases, start with a budget.  

Next decide what type of use and how much you will be using the bicycle.  You said mostly road riding.  Do you prefer straiaght bars like a mountain bike or curved bars like a racing bike?  How many miles would you typically ride or eventually like to ride?  The longer the distance, I would suggest a bicycle with higher quality components and frame.

Make sure the frame is the proper size for your inseam.  

All of these questions could be answered for you at a bike shop.  I would use their expertise to make sure whatever you purchase will be reliable, comfortable, and allow you to enjoy cycling for the purpose you intend.

If your intent is to buy a used bike to save money, make sure it is not really old because you will eventually need maintenance and components have changed dramatically over time.  Make sure the frame has no damage that may show that it was in a wreck.  Do the wheels, cranks, headset, and pedals spin without any woble or looseness or friction?  Will you need to do much maintenance on it to get it into riding condition?  Can you take it to a mechanic to review it?  

Buying a used bike from an enthusiast will give you a better chance of knowing it was well maintained.

Answer 2

fit should be your first look.  you need to know what size bike you need.  If you don't, visit a bike shop and ask.  Next make sure the frame is in good shape and the bike shifts properly.  Take it for a test ride.  don't overspend on a used bike.