A Bike M ake sure the bike fits you - if you've stopped growing, there should be two to three inches of clearance over the frame on mountain bikes, one inch on road bikes, two inches on cross bikes. If you never go off-road, a cross bike is suitable.
Personal experience is important.
Proper initial assembly is the key to bicycle enjoyment and comfort, and this is often an indication. Parts warranties usually last one year. Some shops extend parts warranties. M ake sure you look closely at the parts. Ask the salesperson how the components rate.